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Title
Relationship between fibre characteristics and tensile strength of hardwood and softwood kraft pulps
Authors
Maria Fiserova Juraj Gigac and Jozef Balbercak
Received
November 20, 2009
Published
Volume 44 Issue 7-8 July-August
Keywords
hardwood kraft pulp, softwood kraft pulp, bleaching, beating, fibre strength, fibre length,
Abstract
Fibre characteristics of kraft softwood and hardwood unbleached and bleached pulps, namely FS number – indicating fibre strength, L number – indicating fibre length and B number – indicating fibre bonding ability, were determined by the PULMAC zero-span tester. A higher tensile index of softwood pulp and unbleached pulps is related to a higher FS and L number and, consequently, to higher strength and length of fibres. On the contrary, hardwood pulps have, at an equal tensile index, a higher B number than softwood pulps. At an equal tensile index, the B number of bleached pulp is higher than that of unbleached pulp.
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