The Best Applications of 60 mil HDPE Liner

High-density polyethylene (HDPE) liners are among the best product solutions for many applications that require an impermeability layer. But even among similar applications, the core project requirements can differ. Some applications call for greater durability, while others demand even lower permeability. Fortunately, some product attributes can be modified by changing the thickness of the HDPE liner.

The thickness of HDPE liners can range from 30 to 120 mil. Features such as permeability, strength, weight, roll length, flexibility, and cost can all be affected by the liner’s thickness. The proper mil thickness should be selected during the planning stage of any project, depending on the stresses that will be experienced upon the liner (1). While 40 mil thickness liner is the most commonly used option, other options are preferred under certain conditions.

In this article, we will provide an overview of 60 mil HDPE liners and explore applications these liners are well-suited to tackle.

Typical properties of a 60 mil high-density polyethylene liner

Most HDPE liners will retain their chemical properties regardless of their thickness. In other words, 40 and 60 mil HDPE liners demonstrate equal UV and corrosion resistance. However, there are some aspects of the liner that will change as the thickness increases such as overall strength and puncture resistance. A liner’s permeability is also proportional to its thickness. Therefore, a 60 mil HDPE liner will be less permeable than a 40 mil liner—about 50% less permeable, in fact.

A designer can count on a thicker liner to endure more physical damage. The liner’s increased thickness and strength offers improved weathering resistance, making it better suited for exposed applications.

There are some drawbacks to a thicker liner though. For instance, a 60 mil HDPE liner will be heavier and more expensive to transport and install than a 40 mil liner. A thicker liner will also have a shorter roll length, which necessitates a greater number of seams during installation. While the typical use case will find a 40 mil liner sufficient, regulatory requirement is the most common reason to upgrade a liner’s thickness to 60 mil.

The best applications of a 60 mil HDPE liner

Some projects will fall under rules governed by regulatory bodies such as the EPA. In these situations, the regulations will dictate the minimum thickness of the HDPE liner. For landfill containment of non-hazardous waste, for example, the EPA requires a minimum average thickness of 60 mil to “ensure that the liner material will withstand the stress of construction and the weight load of the waste…” (Environmental Protection Agency, 1999). These requirements, in conjunction with proper construction and quality control, were set to help reduce the potential for tearing or puncturing.

Engineers will also typically call on a 60 mil HDPE liner – or thicker –  for applications requiring greater liner strength or lower permeability. Increasing the liner thickness can happen if the project designers calculate a thinner liner is not able to withstand the region’s 100-year weather event. Thicker HDPE liners can also endure greater physical damage, making it better suited for regions with seismic activity.  

Customizing 60 mil HDPE liners for increased performance

Manufacturers such as AGRU America offer the ability to combine a 60 mil HDPE liner with other geosynthetic products for added functionality. AGRU can extrude liners with asperities to enhance shear strength or studs to allow for fluid flow and eliminate the need for a separate net and/or geocomposite. The liner can also be manufactured with a special conductive bottom layer, which allows for spark testing per ASTM D7240. A conductive lined 60 mil HDPE liner can be used for Construction Quality Assurance Testing for possible holes, punctures, tears, cuts, cracks, and similar breaches over the area during installation or for ongoing monitoring of containment ponds.

AGRU can also customize its HDPE liners with black, green, or white surfaces for standard, aesthetic, or reflective purposes. AGRU HDPE liners undergo strict quality control procedures and use only the highest-grade resins available, ensuring product quality and ability to meet or exceed design specifications. Interested in learning more about the best applications of 60 mil HDPE liners or about AGRU specialized liners? Reach out to an AGRU representative today.

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Citation

• 1. Topliff, CR, “Uses and Installation of HDPE Liner to Reduce Soil Erosion and Prevent Water Loss.” West Texas A&M. Thesis. (2018). Accessed on June 2019. https://wtamu-ir.tdl.org/handle/11310/153.