International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

Recycled plastics find more and more applications. In addition to recycled bulky products, the number and type of products also being used in polymer -mineral composites based on recycled PE and PP. One of the paving products sought by investors are traditional concrete blocks. However, they have their drawbacks, they are heavy, so their transport, logistics must meet stricter requirements, are products that are not very resistant to cracking as a result of impact, are fragile. Mineral-polymer products are the solution to such problems. Innovative compositions for their processing are a polymer – mineral mixture, containing mainly recycled material and mineral fillers (sand, ceramic waste dust). They are therefore products made of waste materials from recycling, recyclates and flakes of polymer materials.
The technology for producing the polymer – mineral composition is based on the extrusion and compression molding technology of the compositions obtained. Polymer compositions are secondary materials, after recycling in the form of recyclates, flakes, and waste plastics, mineral fillers, that is waste ceramic dust, sand as well as activating substances (dyes, plasticizers, adhesion compatibilizers, polymermineral wetting agents). As a result, plastic waste and ceramic waste that cannot be recycled will be effectively processed.
The sprinklers were made of various polymer materials (PP, HDPE) as well as characterized by different shape of working elements and a variable degree of contamination with mineral sludge. The research on the structure of manufactured materials and melt flow rate are presented. The influence of the type of material and mineral deposits on the process ability of the tested polymer-mineral compositions was determined.

The paper presents research on the physical processing properties and morphology of recycled plastics. The scope of work includes conducting the processing of primary PVC and recycled PVC and testing Melt Flow Index and structural investigation of the morphology of materials. In the studies polyvinyl chloride (PVC) Alfavinyl GFM/4-31, was used in the study. This plastic has density of 1230 kg/m3 and hardness of 80 Sh° A. In the experiments, various types of chemical blowing agents were used: Expancel 950 MB80 manufactured by Akzo Nobel. Expancel is a mixture that contains 65 % microspheres in the copolymer of ethylene and vinyl acetate (EVA). The decomposition products of the applied blowing agents mainly include carbon dioxide CO2, a small amount of water H2O and nitrogen N2. The technology for producing the recycled composition is based on the extrusion and compression technology of the compositions obtained. The study of selected physical properties was produced. The research on the structure of manufactured materials, melt flow index MFI, and macroscopic structure are presented.