Making plastic windows

Plastic windows are today the usual windows of windows. But not everyone knows the features of their manufacture.

Polivinyl chloride or plastic is produced at the very beginning. Initially, the appearance of the material from the usual, used in the window openings is characterized. Stone salt and natural gas are used for manufacture, instead of the latter, oil refining products can be used. Recently, they often use wooden windows, they are much better than plastic.