Abstract
The pulping properties of cypress species are not known and the present paper aims to filling this gap. Namely, Cupressus lusitanica Mill.,C. sempervirens L. and C. arizonica Greene have been submitted to kraft pulping and the pulp properties are compared with those of Pinus pinaster Aiton. and P. sylvestris Watereri as references. Schopper Riegler degree, density, Bekk’s smoothness, tensile index, tear index, burst index, stretch, dry zero-span strength, wet zero-span strength, brightness, opacity and light scattering coefficient have been tested. The pulp yields and delignification degrees of cypress woods were lower than those of the pine references. Fibre length, width and coarseness were statistically different between pines and cypress species and C. sempervirens pulps have corresponding data close to those of pine species. Cypress pulps can be refined much faster than pine pulps. The papers sheets of cypress fibres have, in general, lower mechanical performance than those of pine fibres. Papers from C. arizonica and C. lusitanica are similar and C. sempervirens has intermediate properties being between the other cypress and pine species. However, cypress fibres are relatively short, flexible and collapsible and can be refined with low energy demand, and thus could be incorporated into papers resulting in products with better light scattering and smoothness.
Acknowledgments
António J. A. Santos acknowledges a scholarship (SFRH/BD/42073/2007) given by Fundação para a Ciência e a Tecnologia (FCT), Portugal. Centro de Estudos Florestais is a research unit funded by FCT (PEst-OE/AGR/UI0239/2014).
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©2014 by De Gruyter
Articles in the same Issue
- Frontmatter
- Original Articles
- Influence of cellulose supramolecular structure on strength properties of chemical pulp
- Morphological, mechanical, and optical properties of cypress papers
- Determination of ion exchange constants for pairs of metal ions to lignocellulosic materials by column chromatography
- Combustion behavior of oak wood (Quercus mongolica L.) modified by 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU)
- Synthesis and antifungal activity of camphoric acid-based acylhydrazone compounds
- Lignification of ray parenchyma cells in the xylem of Pinus densiflora. Part I: Microscopic investigation by POM, UV microscopy, and TOF-SIMS
- Lignification of ray parenchyma cells in the xylem of Pinus densiflora. Part II: Microchemical analysis by laser microdissection and thioacidolysis
- Distribution of lignin in vascular bundles of coconut wood (Cocos nucifera) by cellular UV-spectroscopy and relationship between lignification and tensile strength in single vascular bundles
- Compression properties of vascular boundles and parenchyma of rattan (Plectocomia assamica Griff)
- Properties of wood-plastic composites (WPCs) reinforced with extracted and delignified wood flour
- Anisotropic elastic properties of common ash (Fraxinus excelsior L.)
- Destructive and non-destructive evaluation of seven hardwoods and analysis of data correlation
- Experimental validation of green wood peeling assisted by IR heating – some considerations of the analytical system design
- The influence of felling season and log-soaking temperature on the wetting and phenol formaldehyde adhesive bonding characteristics of birch veneer
- Comparative evaluation of various lignin determination methods on hemicellulose-rich fractions of spruce and birch obtained by pressurized hot-water extraction (PHWE) and subsequent ultrafiltration (UF)
- Conversion between basic density and apparent density at any moisture content in Eucalyptus grandis
- Postpeak residual capacity of nailed connections of a shear wall
- Obituary
- Memorial on Horst H. Nimz (1930–2013)
Articles in the same Issue
- Frontmatter
- Original Articles
- Influence of cellulose supramolecular structure on strength properties of chemical pulp
- Morphological, mechanical, and optical properties of cypress papers
- Determination of ion exchange constants for pairs of metal ions to lignocellulosic materials by column chromatography
- Combustion behavior of oak wood (Quercus mongolica L.) modified by 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU)
- Synthesis and antifungal activity of camphoric acid-based acylhydrazone compounds
- Lignification of ray parenchyma cells in the xylem of Pinus densiflora. Part I: Microscopic investigation by POM, UV microscopy, and TOF-SIMS
- Lignification of ray parenchyma cells in the xylem of Pinus densiflora. Part II: Microchemical analysis by laser microdissection and thioacidolysis
- Distribution of lignin in vascular bundles of coconut wood (Cocos nucifera) by cellular UV-spectroscopy and relationship between lignification and tensile strength in single vascular bundles
- Compression properties of vascular boundles and parenchyma of rattan (Plectocomia assamica Griff)
- Properties of wood-plastic composites (WPCs) reinforced with extracted and delignified wood flour
- Anisotropic elastic properties of common ash (Fraxinus excelsior L.)
- Destructive and non-destructive evaluation of seven hardwoods and analysis of data correlation
- Experimental validation of green wood peeling assisted by IR heating – some considerations of the analytical system design
- The influence of felling season and log-soaking temperature on the wetting and phenol formaldehyde adhesive bonding characteristics of birch veneer
- Comparative evaluation of various lignin determination methods on hemicellulose-rich fractions of spruce and birch obtained by pressurized hot-water extraction (PHWE) and subsequent ultrafiltration (UF)
- Conversion between basic density and apparent density at any moisture content in Eucalyptus grandis
- Postpeak residual capacity of nailed connections of a shear wall
- Obituary
- Memorial on Horst H. Nimz (1930–2013)