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Refining and enzymatic treatment of secondary fibres for paperboard production : Cyberflex measurements of fibre flexibility
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Orientador(es)
Resumo(s)
Recycling is generally affected by secondary fibre quality. High temperature and pressure during
the drying stage causes irreversible changes in fibre morphology, which is the mainly responsible
for the considerable reduction in the swelling and bonding ability (strength and number of bonds)
[1, 2, 3]. Additionally, the reduced dewatering ability of these pulps is a major problem during
paper manufacture as they decrease the speed on the paper machine and worsen sheet formation [4].
Secondary fibre upgrade is difficult and sometimes unpredictable, as the samples to be treated vary
along with their history. Traditional upgrade methodologies have been used to improve secondary
fibre properties, but the results are most of the times insufficient [1, 5]. Different reports suggest
that treating pulps with enzymes and refining could overcome these problems [4, 6, 7, 8, 9]. More
recently, Cellulose-Binding Domains (CBD’s) usage has been shown as an interesting tool to modify recycled fibres properties.
Descrição
Palavras-chave
Paper pulps Recycling Secondary fibres
Contexto Educativo
Citação
PALA, H. ; MOTA, M. ; GAMA, F. M. - Refining and enzymatic treatment of secondary fibres for paperboard production: Cyberflex measurements of fibre flexibility. In: COST E20 - Wood Fibre Cell Wall Structure. Florence: [s.n.], 2004.