We only work with the best qualities:
All our bins are made of high density polyethylene. It is the ideal manufacturing material for retaining and controlling hazardous and/or chemical substances because, in addition to being a very economical plastic, it has the following technical specifications:
High density polyethylene (HDPE):
High density polyethylene is a polymer that is characterized by:
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- Excellent thermal and chemical resistance.
- Very good impact resistance.
- It is solid, colorless and easy to apply any desired color.
- Very good processability, i.e. it can be processed by the forming methods used for thermoplastics, such as injection and extrusion.
- It is flexible, tough and very light.
- It is more rigid than low density polyethylene.
- It is easy to print, paint or glue on.
- Its density is around 0.940 - 0.970 g/cm3.
- It is not attacked by acids, a maximum working resistance of 60°C is considered for liquids, because at higher temperatures the useful life is reduced.
- It is much better for mechanical and thermal recycling.
What is the temperature resistance of high density polyethylene?
Thermal Stability: In the complete absence of oxygen, polyethylene is stable up to 290 °C. Between 290 and 350 ºC, it decomposes and gives lower molecular weight polymers, which are usually thermoplastics or waxes, but little ethylene is produced.
High-density polyethylene (HDPE) is an unbranched straight-chain polymer. It is harder, stronger and slightly heavier than low-density polyethylene, but is less ductile. Polyethylene with a molecular weight between 3,000,000 and 6,000,000,000 is called UHMWPE (Ultra High Molecular Weight Polyethylene). This material is used to produce fibers that are so strong that they can be used to make bulletproof vests.
Obtaining High Density Polyethylene:
HDPE is obtained by a Ziegler-Natta polymerization process, which is a catalytic polymerization process (Ziegler-Natta catalyst). There are three major commercial processes used in the polymerization of HDPE: solution, suspension and gas phase processes.
The catalysts used in the manufacture of HDPE are generally of the transition metal oxide or Ziegler-Natta type. In this process a solvent is used which dissolves the monomer, the polymer and the polymerization initiator. By diluting the monomer with the solvent, the polymerization rate is reduced and the heat released by the polymerization reaction is absorbed by the solvent. Benzene or chlorobenzene can generally be used as solvents.
In bulk polymerization, only the monomer is polymerized, usually in a gas or liquid phase, although some solid state polymerizations are also carried out. This is a direct polymerization of monomers into a polymer, in a reaction in which the polymer remains soluble in its own monomer. Additionally, with Phillips catalysts (chromium trioxide), HDPE with very high density and straight chains is produced.
Advantages of PEHD:
A product made of polyethylene offers a number of important advantages over conventional systems:
-Minimal frictional load losses.
-It is not attacked in any way by corrosion.
-Absence of sediments and incrustations in its interior.
-Flexibility and elasticity.
-It does not maintain permanent deformations.
-Reduced weight, making it easy to transport.
-Longer lengths, which reduces the number of joints (lower cost) and reduces the possibility of human failure in the installation.
-Long service life due to mechanical strength and ductility.
-Lower acquisition and installation cost.
-Resistant to bacteria and chemicals.
-Polyethylene also has among its advantages that it is a recyclable product, which means that it can be used by third parties to manufacture, for example, plastic pallets, ornamental chairs, plastic flowerpots, etc.
[For more information about the history and characteristics of High Density Polyethylene: tecnologiadelosplasticos.blogspot.com]
