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Polyethylene Injection Molding

Since 1969, Charloma, Inc. has been a leading Midwest polyethylene injection molding company. Charloma entertains high volume production runs as well as low volume production runs  with injection molding machinery ranging in size from 28 to 1000 tons. Depending upon your budget and application, polyethylene plastic may be the most economical material option for your next project.

Polyethylene Properties & Densities

In general polyethylene is light in weight and possess strength, chemical resistance, impermeability and impressive electrical insulating properties. Furthermore, the economical cost of the material makes it an excellent material for disposable and recyclable industrial product applications, whilst it's comparative low density enables more volume of plastic to be processed.

Polyethylene is available in many different densities.

  • High density polyethylene (HPDE) – a food-grade plastic.
  • Low density polyethylene (LDPE) – the first grade of polyethylene to use a high pressure process with free radical polymerization.
  • Linear low density polyethylene (LLDPE) – differs structurally from LDPE because it has short branches and LDPE has long chain branching.

The higher the density of the polyethylene material used the stronger, more rigid and more heat resistant the plastic is. The higher density models show better properties in tensile strength, chemical and heat resistance, surface hardness and abrasion resistance. HDPE for injection molding works well in both hot and cold temperatures and has a tensile strength of 4550 pounds per inch.


Benefits of Polyethylene

  • High levels of ductility
  • Tensile strength
  • Impact resistance
  • Resistance to moisture absorption
  • Recyclable

Industrial Applications of Polyethylene

The versatility of the polyethylene makes the material an ideal choice for the following industries and products:

  • Agricultural products
  • Lawn and Garden products
  • Heavy construction
  • Consumer products, including toys, food containers and garbage receptacles
  • Plumbing products
  • Medical products

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