Study of using water softening process byproduct, calcium carbonate on fine paper production

Barzan, Ali; Resalati, Hossein; Asadpour Atoei, Ghasem

doi:10.22092/ijwpr.2015.8470

Document Type : Research Paper

Authors

¹ Pulp and Paper Ph.D. student, agriculture and natural Resources university, Gorgan, Iran

² Professor, Department of Wood and Paper Science and Technology, agriculture and natural Resources university, Gorgan, Iran

³ Assitant Prof. Department of Wood and Paper Science and Technology, agriculture and natural Resources university, Sari, Iran

https://doi.org/10.22092/ijwpr.2015.8470

Abstract

After water purification and softening, a lot of calcium carbonate with other impurities produce and these byproducts gather and bury as mineral sludge.In this research, The quality of calcium carbonate from water softening process in mazandran wood and paper industry (MWPI) mill and effects of loading of this byproduct on fine paper production was investigated and the results were compared with other industrial fillers like grounded calcium carbonate(GCC) and precipitated calcium carbonate(PCC) and also china clay (kaolin).From the paper structural viewpoint , the fine paper that filled with water softening calcium carbonate (derived after water softening process) have more bulk(bulkier) and more porous and rougher surface compare to fine papers that filled with the common industrial fillers.From the paper strength properties viewpoint , the fine paper that filled with water softening calcium carbonate have less decrease in tensile and burst strength but have not suitable tear strength properties. From the paper optical properties viewpoint, the fine paper that filled with water softening calcium carbonate, because of particles size and impurities of this filler have the least light scattering coefficient and consequently have less brightness and opacity.Adding of 10 and 20 percent precipitated calcium carbonate to by water softening calcium carbonate cause paper porosity and strength decreasing but the optical properties of hand sheets was increased.

Keywords

Main Subjects

Pulp and paper

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Iranian Journal of Wood and Paper Science Research

Study of using water softening process byproduct, calcium carbonate on fine paper production

References

References

Volume 30, SPRING 1 - Serial Number 50
May 2015
Pages 14-25

Study of using water softening process byproduct, calcium carbonate on fine paper production

References

References

Volume 30, SPRING 1 - Serial Number 50May 2015Pages 14-25

Volume 30, SPRING 1 - Serial Number 50
May 2015
Pages 14-25