CRACKING OF COATED PAPERS AT THE FOLD

CPAG (2024),  (стр. 61-68)

АУТОР(И) / AUTHOR(S): Kaja Breskvar, Jure Ahtik, Klemen Možina

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DOI: 10.46793/CPAG24.061B

САЖЕТАК / ABSTRACT:

The phenomenon of cracking in paper coatings was investigated. Coating mixtures were compared according to their composition, the effects of cracking in the coating were determined, and certain combinations of the components of the base paper and the paper coating showed the lowest tendency to cracking. It was shown that the appropriate selection of pigments (calcium carbonate, kaolin) and binders (starch, latex), whose elastic properties influence the deformation of the paper under physical and mechanical stress, is of central importance. An important role is played by the choice of base paper, which should contain as many cellulose fibres as possible and be as long as possible in order to avoid fibre breaks and their interconnections. The content of inorganic substances has a demonstrably negative effect by worsening the physical-mechanical properties of the paper and leading to the deposition of inorganic substances at the joints between the cellulose fibres and reducing their bonding.

КЉУЧНЕ РЕЧИ / KEYWORDS:

paper, coating, coating cracking, paper folding.

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