Fridle Group can supply quality polyethylene seals for your applications
Polyethylene (PE) is one of the oldest polymers and still the most used today: it represents 40% of the total volume of world production of plastics. It is also called with the name of Polythene or, in some cases, also as Polyethene and its general abbreviation is PE.
The history of polyethylene
Discovered almost accidentally by EW Fawcett and RO Gibson, it saw its first production on September 1, 1939, the same day that the Second World War began. Initially it was considered only a material with excellent insulating properties from electricity. During the Second World War it was used in large quantities in radar-related applications. After the war, it was in danger of disappearing until it was discovered that its properties are much more versatile than previously thought. Fundamental in the world of plastics was the discovery of Karl Ziegler who discovered the complete dimerization reaction of ethylene to butylene. Immediately thereafter he discovered the way of obtaining high linear polymers of ethylene under conditions of low temperature and pressure. These discoveries marked the beginning of the revolution in the world of polymers.
The characteristics of Polyethylene
The technical characteristics of polyethylene depend strongly on its molecular weight, the crystallinity rate and the distribution of the molecular weights. This material offers high resistance to chemical agents, impact, abrasion, corrosion, and has a high degree of viscosity. It is resistant to water, saline solutions, acids, alkalis, alcohol and petrol. However, it is incompatible with oxidizing acids such as nitric acid, sulfuric acid and halogens.
Types of polyethylene
The different types of polyethylene are distinguished at first by the different molecular weight (intended as the length of the polymer chains that make up the material), which has direct effects on the properties of each. The most commonly used PE are the so-called "high density" ones, such as HD-PE, PE-HMW (high molecular weight) and PE-UHMW (very high molecular weight). There is also a low density range, which includes PE-LD and PE-LLD, which, however, is mainly used as a material for packaging or for molding components with low functionality, due to the very poor mechanical properties.
What are the applications of polyethylene seals?
Polyethylene seals can be used for food purposes as they are non-toxic and because they absorb water or liquids in a very reduced way. They are also suitable for the automotive sector, household appliances and for use in carpentry. Polyethylene seals are also used in the various assembly sectors where resistance to high temperatures is not required. They are normally used with temperatures between - 40 ° c and + 80 ° c
If you want to ask for more information on the polyethylene gaskets supplied by Fridle Group and you are interested in receiving the technical data sheets, do not hesitate to contact the company.