Open AccessCRACKING PHENOMENA OF COATINGS ON LABEL PAPERS
Author(s) -
Kaja Breskvar,
Jure Ahtik,
Klemen Možina
Publication year - 2021
Publication title -
cellulose chemistry and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.302
H-Index - 32
eISSN - 2457-9459
pISSN - 0576-9787
DOI - 10.35812/cellulosechemtechnol.2021.55.29
Subject(s) - coating , cracking , chemistry , composite material , calcium carbonate , cellulose , cellulose fiber , starch , fiber , materials science , organic chemistry
"The phenomenon of paper coating cracking when folded was studied. Coating mixtures were compared according totheir composition, applied on different base paper, to find which combinations of the constituents of the base paper andthe paper coating results in a lower tendency towards fold cracking of the coating layer. It was shown that theappropriate selection of pigments (calcium carbonate, kaolin) and binders (starch, latex), whose elastic behaviorextensively influences the deformation of paper under physical and mechanical stress, is of central importance. Thechoice of the base paper plays a significant role as well, it should have the longest and the most numerous cellulosefibers possible in order to avoid fiber breaks and inter- and intra-fiber connections. The content of inorganic substanceshas the greatest negative effect on deteriorating the physical-mechanical properties of the studied label papers, leadingto the deposition of inorganic substances at the joints between the cellulose fibers and reducing their bonding."