Polyvinyl chloride (PVC) - a material relating to the group of thermoplastics (Thermoplastic - a plastic, which, after molding products retain the ability to re-processing). Pure PVC of 43% is composed of ethylene (petrochemical product) and 57% of the combined chlorine derived from common salt. PVC is allocated in the form of powder. For the production of window profiles, PVC powder to add stabilizers, modifiers, pigments and auxiliary additives. These components have an impact on such properties window profiles, as light resistance, resistance to weathering, color tint, surface quality, weldability, etc.
As the stabilizer is mainly used lead, which is located in the PVC in a bound, ie biologically dormant. Recently, a number of companies have adopted an even more innocuous compound of calcium and zinc.
To increase the impact toughness (impact strength - is the ability of a material to absorb mechanical energy in the process of deformation and fracture under the action of shock loads) of polymeric materials used for manufacturing system profiles, add modifiers that increase the strength of window parts as they are processed. So sometimes PVC, used for the manufacture of window profiles, referred to as modified.
Should also be noted that the content of vinyl chloride monomer in 1 kg of profile does not exceed 1 mg and their selection at any processing profiling does not occur.
PVC is not readily ignite and self-extinguishing material. It is resistant to alkalis, acids, lime, as well as to atmospheric effects.
Proceeding from the foregoing, we see that the material used for the manufacture of plastic windows, is harmless to humans. This is confirmed by hygienic certificate, which manufacturers profiles are in Russia.
Plastic windows can be used in industrial, public and residential buildings, no sanitary restrictions on their use there. Another thing is that the windows of any material, including PVC must satisfy a list of technical requirements, such as: thermal conductivity, providing normalized air, soundproofing, etc. These are all areas of their application. Metal windows, production and sale Our review of the PVC would not be complete if we did not mention another important issue. This utilization. This problem in our country has not yet received due attention, but in the world, it is very serious. We must give the system designer plastic windows, which created the concept of multiple use. Wastes from the production and profile of the dismantled windows can be recycled up to 5 times without any loss of quality characteristics of the feedstock. When disposing of minor changes only color plastic.
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