Polyvinyl chloride (PVC) is a material that is obtained from natural raw materials, salt and oil, powder. PVC is one of the most economical and most widely used materials. PVC is used for production of profiles especially in EU countries that are otherwise very rigorous in that regard, so PVC has no additives negative for human health. It does not contain lead and the like.
In everyday life, in whole or in part, we use products from oil and its derivatives, therefore, it is not only used as a fuel for vehicles, but oil is also present in cosmetic products (detergents, lipsticks, shampoos ...), in the manufacture of medicines, orthopedic aids, and even artificial hearts are made of oil. For example, balloons, felt-tip pens, glue, piano keys, clothes are made from petroleum.
So, life would have been unthinkable without these and many other products.
When selecting glasses filled with argon gas, it is most common among customers to fear that argon will eventually “disappear” and that the excellent properties of the glass will therefore be reduced. The following calculation shows that, although there is a loss of gas, its quality in terms of thermal insulation properies does not reduce.
Therefore, the initial gas concentration at the moment of sealing must be 90% (± 5-10%), and the loss of gas on an annual basis must be less than 10 ‰. Assuming that the initial concentration of argon is 92%, this means that, according to the predicted argon losses, its concentration will decrease to 82% after 10 years. This provides a coefficient of W = 1.16W / m2K, and after 20 years W = 1.19W / m2K, which is a far better coefficient compared to W = 2.6 W / m2K in ordinary glass.