Archive: Aug 2019

High Density Polyethylene

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Choosing the right plastic is essential to the success of every manufacturing and packaging project. Most plastics are formed from any of six different popular plastics or a plastic mixture with concentrations of different resins.

Short-term storage containers, such as bottles and jugs, are usually made from high-density polyethylene (HDPE). This is a versatile and robust plastic. HDPE plastic containers are identifiable by the numeral “2” printed inside the container’s recycling symbol.

An Overview of HDPE

High-density polyethylene is produced from petroleum. It is a thermoplastic polymer—a polymer that melts into a liquid for easy forming and shaping. Manufacturers can easily create strong, customized containers by melting and treating HDPE.

The material is also ideal for custom printing and coloring, making it one of the most common materials for packaging. HDPE can also be made food-safe and it withstands caustic chemicals.

Given this versatility, it is used to make a variety of common containers such as:

  • Bleach bottles
  • Cutting boards
  • Milk jugs
  • Piping
  • Plastic bottles
  • Shampoo bottle

One of HDPE’s most essential characteristics is its strength. The plastic has a high degree of tensile strength, so it is resistant to breakage from tension and impact damage. HDPE also has a high melting point, so it won’t degrade from heat under general, non-factory conditions. These features make the material ideal for producing reliable containers for consumer products and materials being transported.

Other benefits of using HDPE include:

  • Easily recyclable
  • Resistant to corrosion, even when holding liquid
  • Can be melted and reshaped
  • High strength-to-density ratio, making it cost-effective for transporting materials and products

Differences Between HDPE and LDPE

High-density polyethylene is just one type of polyethylene. Low-density polyethylene is lighter and more flexible.

During fabrication, HDPE’s polymer chains endure minimal branching. This keeps the polymer’s linear molecules closely knit together. The chains crystallize in a tight formation, which gives HDPE its rigid and relatively dense structure. It can hold a firm shape, even under pressure.

Conversely, the polymer chains of LDPE undergo significant branching and spreading. The polymer chains are more diffuse and scattered, giving them much less structure. This makes the material lighter, more flexible, and more susceptible to damage.

As such, HDPE is preferred for most manufacturing and packaging purposes. It can form reliable, structured products such as toys, garbage cans, storage containers, jugs, and pipes. Recently, HDPE has also begun to replace cardboard as the preferred material for fireworks tubes. The plastic material is less likely to shatter during malfunctions and can be recycled once the firework has been used.

Low-density polyethylene is used to produce cling wrap, plastic bags, and other unstructured products.

Custom HDPE Solutions from New Process Fibre Today

HDPE is a sturdy, versatile material that provides an ideal material for manufacturing storage containers of many different types.

New Process Fibre specializes in complete stamping and die cutting services for HDPE. We also produce sheets, rolls, and coils of high-quality plastics in standard and custom colors at high speeds. We can provide HDPE in custom thicknesses, widths, and colors to meet your project specifications. We are an ISO 9001:2015-certified manufacturer.

Contact us today to learn more about our variety of plastic fabrication and stamping services or request a quote for your next project.

The Uses of Retaining Washers

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Retaining washers guide cords, cables, wires, and chains in an assembled product. One hole allows the washer to be secured to other components using a screw or bolt. Another opening allows the line to be firmly attached to the washer, thus securing the line in the desired position. These simple devices have a number of important applications. Different materials and finishes allow manufacturers to create these products to fit their design needs and aesthetic expectations.

Applications for Retaining Washers

The properties of retaining washers make them ideal for industrial applications.

  • Flexible rings are easy to remove for maintenance and other production purposes. As part of the design, flexible washers allow enough movement to protect delicate mechanical parts.
  • Sturdy washers keep bolts, screws, and other components in place while keeping their shape.
  • Easy-to-install washers often ease the installation of other parts as well.

Retaining washers are an important part of many industries. In the automotive industry, manufacturers use these components to keep upright washers properly affixed. These components perform a number of vital tasks in industrial settings, from simple functions like securing screws to more advanced purposes like quarter-turn and wire guide assemblies.

Washer Types and Material Finishes

There are two main classifications for retaining washers:

  • Internal washers place protrusions in the center of the piece
  • External washers feature protrusions on the outer edges of the unit

The inside diameter of retaining washers are shaped to allow it to easily slide into place without compromising its ability to hold components in place. During the manufacturing process, the insides of washers are customized specifically for their intended use.

Metals used in the manufacture and finishing of retaining washers can be chosen to meet the requirements of the end product. Some of the more common manufacturing materials are:

  • Steel
  • Aluminum
  • Brass

Popular finishes include:

  • Nickel
  • Zinc
  • Tin
  • Silver
  • Cadmium

Customized Retaining Washers for Use in Manufacturing

Retaining washers are a versatile component in a diverse range of industrial applications. These components can be customized with internal or external support from a number of popular production metals. The look and function of washers are further specialized with the addition of finishes.

New Process Fibre Company produces high-quality retaining washers that fit our clients’ exact specifications. Learn more about your customization options by downloading the Non-Metallic Material Selection and Properties Guide. This report will familiarize you with the possibilities of production. When you’re ready, contact our representatives for a free consultation on your project.



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Additional Resources

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