| Abstract [eng] |
Vinyl wallpapers are most popular in the nowadays wallpaper market. It is made out of non-woven or paper coated with plasticized polyvinyl chloride (PVC). PVC has very good mechanical and physical properties, these properties stays even if products are exploited outside. But plasticized polyvinyl chloride contains toxic phthalate plasticizers, which later migrate to the environment. Project goal– develop and investigate polymer coating layer, which would be suitable for standard wall coverings printing technology, but would not contain any harmful or toxic components. Also would be resistant for washing and environment impact. This new polymer coating should fit the same price range as PVC. During research it was made theoretical analyses of suitable polymers for top layer of wallpapers. After rheological and mechanical analyses it was decided to use low density polyethylene (LDPE) and octane-ethylene copolymer (EOC-1) blends and ethylene octane plastomer (EOE). However thermal analyses showed that when blend contains more than 10 % EOC-1 blends are not homogenous. Also to reach the properties of EOE polymer it is required 60 % of EOC-1, so for further experiments it was decided to use EOE, which also has low tensile modulus. It was found that adding disperse fillers improve EOE mechanical properties. Fillers as dolomite, dolomite with smaller particles and coated calcium carbonate, disperse well in the polymer matrix and form homogenous compounds. During the project exploited properties: resistant to sunlight, wear resistant and mechanical properties, of developed and standard plastisols laminates were compared. Also it was found that developed wallpapers do not contain any vapour components contrary to vinyl wallpapers. |
