|
Title
Comparison of hardwood kraft pulp fibre characteristics and tensile strength
Authors
Maria Fiserova and Juraj Gigac
Received
December 29, 2010
Published
Volume 45 Issue 9-10 November-December
Keywords
kraft pulp, hardwood species, beating, fibre strength, fibre length, fibre bonding ability, tensile
Abstract
Fibre characteristics of kraft pulps from hornbeam, birch, poplar, beech, oak and black locust, namely fibre strength (FS number), fibre length (L number) and bonding ability (B number), were determined by the Pulmac Zero-Span Tester. The fibre strength and fibre length of hardwood kraft pulps increased in the following sequence: black locust pulp < oak pulp < beech pulp < poplar pulp < birch pulp < hornbeam pulp. The influence of laboratory beating on FS number and L number of hardwood kraft pulps is analogous; an increased beating degree reduces slightly these fibre characteristics. On the other hand, the bonding ability of hardwood kraft pulps increased in the sequence: hornbeam pulp < birch pulp < poplar pulp < beech pulp < oak pulp < black locust pulp. With increasing the beating degree, B number increased in the whole range of beating degree, unlike FS number and L number. The tensile index increased in the following sequence: black locust pulp < oak pulp < beech pulp < poplar pulp < birch pulp < hornbeam pulp. The tensile index depends especially on the FS number and L number of hardwood kraft pulps. The lower FS number and L number of beech, oak and black locust kraft pulps are compensated, to some extent, by a higher B number.
Link
|
