PE Plastic Pipe-What Is The Concept of HDPE?
What Is HDPE
HDPE is denser than most other polymer plastics, namely low-density polyethylene. This is due to its crystallographic structure occurring in a linear fashion rather than branching to form long chains of polyethylene. Instead, the lack of branching causes its carbon molecules to bond with more hydrogen molecules. This gives the final product greater tensile strength, even though it is lighter than water. It also makes HDPE highly resistant to acids and solvents.
However, the production of HDPE did not happen by accident or natural event. The lack of branching in the polymerization process is intentionally induced by a reagent called a Ziegler-Natta catalyst. Typically, these catalysts are derived from titanium compounds.
HDPE Features
Because HDPE is so durable and chemically non-reactive, it has many applications in a variety of industries. It is used in many different types of packaging containers, such as milk and laundry detergent bottles, as well as plastic grocery bags. It is also found in storage systems used to store chemicals and fuels. In fact, high-density polyethylene is used to produce materials that serve as chemical barriers, such as liners placed under landfills, to help prevent soil and groundwater contamination. One of the most common uses of this material is in the manufacture of wood-plastic composites for furniture, flooring, fencing, and landscaping materials.
HDPE Applications
In terms of environmental impact, products made from high-density polyethylene do not biodegrade easily in landfills. However, these products can be recycled, albeit at the risk of losing some of their original tensile strength. Since the material is composed of hydrogen and carbon, exposure to high temperatures only results in the release of water and carbon dioxide. However, additives, such as flame retardants, UV stabilizers, and dyes, can create other toxins. Additionally, some environmental groups have expressed concerns about the potential hazards of phthalates used in the production of children’s toys, such as teething rings, made from high-density polyethylene.
