HDPE | High Resistance Anti-hail nets
The material raw used by HELIOS GROUP is a special first choice virgin High Density Polyethylene (HDPE): an inert plastic material, water-repellent, not polluting and recyclable, which gets heated and melt to obtain the monofilaments (yarns) that will be later used to textile our nets.
Exclusive components are added to the HDPE, which allow the net to maintain its mechanical characteristics long in time and resist the action of atmospheric agents, in particular the deteriorating action of UV rays.
High Density Polyethylene (HDPE) is a thermoplastic polymer obtained from oil. 1,75 kg of oil is needed in order to produce 1 kg of HDPE, in terms of energy and material raw. Polyethylene is obtained by polymerization of ethylene.
Changing the condition of polymerization (pressure, temperature, catalyst), it is possible to obtain products with different molecular weight, different structure, different chemical and physical properties.
High Density is achieved by polymerization of ethylene at around 20 bar and at a temperature a little bit higher than 100 °C, in presence of catalysts.
The obtained HDPE presents just a few molecular ramifications, with the result that intermolecular strengths and resistance to traction are higher compared to Low Density.
Therefore, HDPE presents a softening point higher than 15 °C, a better superficial brightness, a better physic resistance (breaking point), a better chemical inertia and it can stand higher temperatures. Strong resistance is vital for anti-hail nets, since they must support big mechanical solicitations.