PVC

Today, mere 70 years from its first market appearance, PVC is one of the most diffused plastic materials in the World.

Almost a century divides the synthesis of vinyl chloride, achieved in laboratory by V.H. Regnault, a French scientist, in 1835, from the production of the first items made of PVC.
The polymerization of vinyl chloride was already achieved in laboratory since the years immediately before WW1, but actual production of PVC started in the US during 1927, and mass-production began only from 1939.

The vinyl chloride monomer, briefly VCM, easily polymerizes forming PVC. Polymerization means the chemical process through which a substance formed by two or more molecules, which are called monomers, of the same compound is obtained.
The polymer term (from ancient Greek poli=many and mera=part) means substance composed by many fundamental units which are repeated many times in the structure, like a wall formed by many identical bricks.

To make it occur, the following procedure must be followed: VCM, water and specific additives, such as "catalysts" or reaction accelerators,emulsifiers, dispersers etc., are introduced in the autoclave and under the combined action of heath and mechanical shaking, polymerization is performed. Most part of the VCM molecules aggregate forming the chain macromolecules of the PVC which, dried and purified, appears as a white dust. The raw materials PVC comes from are oil and sodium chloride, better known with the name of rock salt or, simply, salt. Considering that, in nature, salt is present in large quantities and does not represent an energy source, it can be said that PVC production depletes natural resources in a proportionally less significant way than the other mass polymers, which, on the other hand, are completely derived from oil.

From salt, chlorine and sodium are obtained by electrolysis, in fixed proportions. The chlorine obtained through electrolysis replaces part of the hydrogen contained in ethylene, an unsaturated hydrocarbon present in cracking gases of petroleum products, generating in this way the vinyl chloride monomer, whose empirical formula is (CH2 = CHCl), and hydrochloric acid (H-Cl). Items made of polyvinylchloride are smooth, bright, impermeable to oil, grease and smells, may be transparent or opaque, are self-extinguishing and they don't propagate flames, are usually rigid and stand well against abrasion.

Advantages of PVC

  • Sound Insulation

    Thanks to the sound-absorbing abilities of PVC multi-chamber profiles, sound insulation values are very high and suitable to guarantee the maximum level of comfort.

  • Thermal Insulation.

    PVC multi-chamber profiles have an extremely low thermal conductivity value, which equates to a better thermal insulation and a significant economic saving.

  • Fire resistance

    Extremely safe for any kind of building, PVC is flame retardant and self-extinguishing (class 1).

  • Water and air impermeability.

    Frame, opening shutters and special gaskets ensure a perfect tightness against leaks, also under extreme weather conditions. Actually, the profiles are Clima S certified, suitable and specific for severe climates.

  • Ecology and environment

    PVC does not pollute and protects the environment, it is, furthermore, fully recyclable.

  • Design versatility.

    Our profiles, with their contemporary design, can be easily adapted to any architectural-environmental context: sea, mountain and urban environments. We offer optimal solutions both for new and for renovated buildings.

  • Easy to install

    The installation of new fittings implies the application of the frame, also without removing the older one and without interventions on the existing masonry.

  • Absence of maintenance and easy cleaning

    The action of time and weather elements, such as humidity, saltiness and solar irradiation, do not alter PVC, which, over time, needs only a simple cleaning with a damp, soft cloth.

Infomrations

PVC - Applications, composition, manufacturing, finish Pdf Document
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Performance requirements of extruded profiles Pdf Document
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