What is polyethylene with high density?
Polyethylene with high density (HDPE) is a type of plastic made of oil. Because this material can be established by subsequent melting and shaping, it is classified as a thermoplastic polyethynene. It can also connect in segments in welded or machined. It does not accept adhesives very well. Also known as high -density polyethylene (Pehd), products made of high density polyethylene are marked with the imprint of the "2" surrounded by Möbi's strip recognized as a symbol of universal recycling.
As the name suggests, the density with a high density of polyethylene density than most other polymer sculptures. This is due to its crystallization structure, which occurs in a linear way than branching and creates long chains of polyethylene. Instead, the lack of branching results in his carbon molecule with multiple hydrogen molecules. This allows the final product to have more tensile strength, even if it is lighter than water. Also a real polyethylene with high density of high resistancenicked to acids and solvents. In fact, the lack of branching during the polymerization process is intentionally induced by adding the type of agent known as the catalyst Ziegler-Natta. These catalysts are usually derived from titanium compounds.
Because high density polyethylene is so durable and chemically unreactive, it has numerous applications in various industries. It is used in many different types of packaging, such as bottles with milk and detergents, as well as plastic food bags. It is also found in storage systems designed to store chemicals and fuels. In fact, high density polyethylene is used to produce materials that act as chemical barriers, such as inserts that are located in landfills to prevent groundwater prevented soil. One of the most common uses of this material is the production of wooden plastic composites to make furniture, PFLD, fencing and off -road materials.
In terms of environmental impact, products made of high density polyethylene are easy to biodegrade in landfills. However, such products can be recycled, although with the risk of loss of some of its original tensile strength. Since this material is constructed from hydrogen and carbon, it is exposed to high heat only to release water and carbon dioxide. However, ingredients such as fire slowing, UV stabilizers and dyes can produce other toxins. In addition, some environmental groups express concerns about the potential risk of phthalate leeches used in the production of toys of some children made of high density polyethylene, such as biting rings.