Abstract
The present work was based on analysis of the flow regime of fibre suspensions, that corresponds to furnishes and process conditions typically established for tissue paper manufacturing, i.e., under the common range of stock consistencies at the machine headbox and most usual furnish compositions. The flocculation potential of fibre suspensions used for toilet papers, facial tissues, paper towels and table napkins were evaluated on the principles of analytical concepts for fibre agglomeration propensity. The results show crowding numbers from 5.0 to 69.0, depending on the type of fibre or fibre blending ratios. The findings regarding agglomeration factors indicate that flow regimes are mainly in semi-concentrated and around gel state zones but reached the concentrated flow regime, in extreme conditions of fibre morphology and stock consistency. The influence of hardwood and softwood mixture ratios on the fibre suspension features is shown and discussed for common formulations of tissue base paper. The effect of fibre length and coarseness on the flocculation potential and the impacts of fibre suspension flow regimes on the structural properties of tissue paper, such as the formation uniformity are discussed, demonstrating the reasons for the preferred use of high hardwood content in furnish balance for tissue paper manufacturing.
Acknowledgment
The support by the Chemical Engineering Department Research Associate Programme of the Polytechnic School of the University of Sao Paulo is thankfully acknowledged by A.H.T. Mendes.
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: None declared.
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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Articles in the same Issue
- Frontmatter
- Biorefining
- Possible alternatives for using kraft lignin as activated carbon in pulp mills – a review
- Technical kraft lignin from coffee parchment
- Nitric acid-potassium hydroxide fractionation of rice straw: an integrated biorefinery initiative
- Paper technology
- The influence of fibrous suspension flow regimes on the formation of tissue paper manufactured from different furnish compositions
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- Assessment of paperboard large deformation at fold using digital image correlation technique
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- Pre-treatment with calcium hydroxide and accelerated carbonation for cellulosic pulp fibrillation
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Articles in the same Issue
- Frontmatter
- Biorefining
- Possible alternatives for using kraft lignin as activated carbon in pulp mills – a review
- Technical kraft lignin from coffee parchment
- Nitric acid-potassium hydroxide fractionation of rice straw: an integrated biorefinery initiative
- Paper technology
- The influence of fibrous suspension flow regimes on the formation of tissue paper manufactured from different furnish compositions
- Paper physics
- Assessment of paperboard large deformation at fold using digital image correlation technique
- Paper chemistry
- Response surface methodology optimization and antimicrobial activity of berberine modified trimethoprim carboxymethyl cellulose
- Packaging
- Addition of bentonite to cationic starch matrix for coating on kraftliner paper to improve grease resistance
- Recycling
- Changes in water-vapor-adsorption isotherms of pulp fibers and sheets during paper recycling, including drying of wet webs, and disintegration and sonication of dried sheets in water
- Determination of fines in recycled paper
- Disintegration of toilet papers used in shopping malls
- Nanotechnology
- Cryoslash as an effective pre-treatment to obtain nanofibrillated cellulose using ultra-fine friction grinder with kraft pulp
- Pre-treatment with calcium hydroxide and accelerated carbonation for cellulosic pulp fibrillation
- Chemical technology/modifications
- Study on manufacturing hot water-resistant PVOH coated paper by gas grafting palmitoyl chloride (II)–Control of palmitoyl chloride penetration by inorganic pigments coating
- Lignin
- Efficient and eco-friendly isolation and purification of lignin from black liquor with choline chloride-based deep eutectic solvents
- Misc
- Flocculation of alkyl ketene dimer and calcium carbonate on paper sizing and filling performance