Abstract
The purpose of present work was to study tensile and stretch of paper prepared with the use of bactericide zeolite fillers containing up to 130 mg/g of silver, 72 mg/g of copper, and 58 mg/g of zinc, prepared by ion exchange reactions using heulandite-clinoptilolite from the Rkoni plot of the Tedzami deposit, Eastern Georgia. Filled papers with zeolite content up to 4 g/m2 and bactericidal activity confirmed by the colony forming unit assay were manufactured on the production lines of the GPM enterprise (Tbilisi, Georgia). The measured tensile strength and percentage elongation of filled paper depend on the nature of the filler and its metal content; the introduction of pure zeolite filler reduces the tensile and stretch of the paper, but fillers containing silver and copper increase the tensile strength. Accelerated aging results in lower tensile and stretch, but zeolite fillers generally make the paper more resistant to aging.
Highlights
Paper is a complex composite material made up of a combination of biological, synthetic, and inorganic materials
Zeolites have been used in papermaking since the 1960s as fillers for filter papers [1], but primarily to improve optical properties of paper, its bulk and printability, as well as to increase retention at the wet end [2]
Zeolites are used to control organic contaminants in fibers and to reduce stickiness in paper mill furnish formed with recycled fibers, as well as for pitch control in paper mill furnish formed with virgin fibers [5]
Summary
Paper is a complex composite material made up of a combination of biological, synthetic, and inorganic materials. Components include wood pulp and other wood components or other fibers and fines, inorganic (mineral) and organic fillers, natural and synthetic polymers for sizing, retention and strength, as well as other additives to meet specific product or process requirements. Zeolites have been used in papermaking since the 1960s as fillers for filter papers [1], but primarily to improve optical properties of paper, its bulk and printability, as well as to increase retention at the wet end [2]. The first experimental results showed that the use of clinoptilolite as filler for machine glazed paper, writing paper, frisket paper, and newsprint paper is feasible, and the quality of types of paper with clinoptilolite filler fully meets the requirements for the adopted product [3]. Zeolites are used to control organic contaminants in fibers and to reduce stickiness in paper mill furnish formed with recycled fibers, as well as for pitch control in paper mill furnish formed with virgin fibers [5]
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