Enzymatic upgrade of old paperboard containers

• Autor(es): Pala, H. ; Lemos, M. A. ; Mota, M. ; Gama, F. M.
• Data: 2001
• Identificador Persistente: http://hdl.handle.net/1822/1698
• Origem: RepositóriUM - Universidade do Minho
• Assunto(s): Cellulase; Cellulose binding-domains; Pulp and paper; Drainage; Physical properties
• Tipo de Documento: Artigo
• Idioma: Inglês

Descrição

The use of enzymes in secondary fiber (old paperboard containers) upgrading was investigated. The following aspects were analyzed: (i) the effect of several enzymes and (non-hydrolytic) cellulose-binding domains on the pulp and paper properties; (ii) factors influencing enzymatic treatment of secondary fiber: enzyme dosage and reaction time; and (iii) enzyme action on fractions with different fiber-length. In general, all the tested enzymatic preparations were able to improve the pulp drainability. In most cases this improvement was obtained at the expense of paper strength. The use of cellulose-binding domains allowed for the simultaneous increase in drainability and strength properties.