What is PVC?

Vladimir Kulinich
Vladimir Kulinich
March 15, 2013
What is PVC?

Many have metal-plastic windows in the house, but few know that they are made of PVC. About what PVC is, our article will tell.

PVC (Polyvinyl chloride) is a special material that belongs to the group of thermoplastics. Thermoplastics are plastics that can be recycled when making any products from them.

  • Pure polyvinyl chloride consists of 56% of bound chlorine derived from salt and 44% of ethylene (this is a petrochemical product). Polyvinyl chloride is usually isolated in the form of a powder. For the production of, for example, window profiles, auxiliary additives, modifiers, pigments and stabilizers are added to this powdered polyvinyl chloride. Each of these components has an impact on such properties of products as weather resistance, light resistance, color shade, weldability, surface quality and many others.
  • Lead is usually used as a stabilizer in polyvinyl chloride.It is in polyvinyl chloride in the bound, that is, passive (biologically) state. Nowadays, many companies have begun to use an almost harmless compound of zinc and calcium instead of lead.
  • To increase the toughness, that is, the ability of this material to absorb mechanical energy during fracture or deformation under the influence of shock loads, special modifiers are added to polyvinyl chloride materials that are used to manufacture various parts. These modifiers significantly increase the strength of parts during their further processing. That is why polyvinyl chloride, which is used to make windows, is also called modified PVC.

It is necessary to know that the content of vinyl chloride monomers in 1 kg of PVC products does not exceed 1 mg. The selection of these monomers in any processing of such parts does not occur.

PVC is also a big plus in that it is a self-extinguishing and highly inflammable material. Polyvinyl chloride is resistant to the chemical action of acids, alkalis, lime.

Now you know what PVC is!