Plastic Properties of High Density Polyethylene (HDPE)

A linear polymer, High Density Polyethylene (HDPE) is prepared from ethylene by a catalytic process. The absence of branching results in a more closely packed structure with a higher density and somewhat higher chemical resistance than LDPE. HDPE is also somewhat harder and more opaque and it can withstand rather higher temperatures (120° Celsius for short periods, 110° Celsius continuously). 

High density polyethylene lends itself particularly well to blow molding, e.g. for bottles, cutting boardsdipping basketsdippers, trays and containers. Dynalab Corp's plastic fabrication shop fabricates thousands of catalog and custom acrylic products.

HDPE fabrication quote request.

Don't see the answers to your high density polyethylene questions? It must be time to see what Mr. Plastic has to say. Mr. Plastic is a wealth of technical, practical and even some hysterical plastic advice. Please submit your request via e-mail, phone calls will not be accepted.

HDPE Wide Mouth Laboratory Bottles HDPE Laboratory Sieve and Receiver - available by custom quotation
Blow molded high densitypolyethylene laboratory bottles are among the most common containers for use in labs, education, healthcare and industry.

High density polyethylene laboratory sieve
and receiver features a polyester mesh screen. This product is a great example of how versatile HDPE is to work with, it has been cut, bonded, drilled and machined to its finished state.

HDPE Resistance:

HDPE Quick Facts:

  • Excellent resistance (no attack) to dilute and concentrated Acids, Alcohols and Bases.
  • Good resistance (minor attack) to Aldehydes, Esters, Aliphatic and Aromatic Hydrocarbons, Ketones and Mineral and Vegetable Oils.
  • Limited resistance (moderate attack and suitable for short term use only) to Halogenated Hydrocarbons and Oxidizing Agents.
  • Maximum Temperature: 248°F 120°C
  • Minimum Temperature: -148°F -100°C
  • Autoclavable: No
  • Melting Point: 266°F 130°C
  • Tensile Strength: 4550 psi 
  • Hardness: SD65
  • UV Resistance: Poor
  • Translucent
  • Rigid
  • Specific Gravity: 0.95

HDPE is readily available in many forms such as sheet, rod and tubing for fabrication: 

Additional Information

  • Excellent for many food related products, FDA, NSF, and USDA approved for direct contact (depending on grade of material). This material machines extremely well.
  • Good chemical resistance and high rigidity make it a good choice for trays and tanks.
  • Other uses include pipe fittings, wear plates, hinges and cutting boards.
  • Good impact resistance, light weight, very low moisture absorption, and high tensile strength. Not a good candidate for gluing. Mechanical fastening is one option, but preferably joined by hot air or nitrogen welding. Also, Ultrasonic, Laser, and infrared welding.
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Additional Plastic Properties

 Polycarbonate  High Density Polyethylene  Low Density Polyethylene Nylon  PVC
 PTFE Acrylic  ABS Polypropylene  Acetal