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Title
Influence of the composition of polyvinyl chloride - plastisols - components on the properties of structured wallpapers
Authors
T. Boshkova D. Rozalinov D. Todorova and A. Ganchev
Received
August 27, 2008
Published
Volume 43 Issue 1-3 January-March
Keywords
PVC paste, wallpaper, viscosity, whiteness, mattness degree
Abstract
The large diversity of utility wallpapers provided on local and world markets is considerable, determining an increased demand and enhancing both quality and aesthetic claims. A thorough research on the composition of some basic components of polyvinyl chloride (PVC) pastes (plastisols)1 is a prerequisite for assuring a high quality production, optimal optic features (whiteness, opacity, gloss), suitable viscosity and behavior at foaming, foam structure homogeneity, thermal and mechanical stability at layering, and perfect adhesion. The present paper investigates the influence of some basic components of PVC pastes on coating whiteness, opacity and viscosity. Three types of paper have been used. The recipes for the PVC pastes used in the preparation of various structured wallpapers have been formulated and particularized under laboratory conditions. The results obtained show that: • PVC paste viscosity depends on the coarseness of the PVC component particles, seen as diminishing with their increase, as a result of lower dispersion, lower stability and lower uniformity. • Time-stability of the PVC paste viscosity depends on particle coarseness and plasticizer’s molecular mass and gelatinizing ability. The average values of the molecular mass and of the final gelatinizing ability of the plasticizer give PVC pastes with minimal viscosity deterioration in time.
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