Selective addition of C-PVAm to improve dry strength of TMP mixed tissue paper
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Jin Ho Seo
Abstract
During the manufacture of low basis weight tissue paper, it is difficult to efficiently use the dry strength agent (DSA) because a large amount of DSA adsorbed fines releases in forming roll by centrifugal forces. In this study, cationic polyvinylamine (C-PVAm) was used as a DSA in an environment where the retention of fines was weak. Addition of C-PVAm to the thermomechanical pulp (TMP) or TMP mixed with softwood bleached kraft pulp (SwBKP) improved the turbidity of filtrate from sheet former, however, the strength of handsheet paper was similar to that without C-PVAm. When C-PVAm was selectively added to SwBKP as much as 4 %, the tensile index could be improved by approximately 10.6 % without changing the retention of fines. In addition, C-PVAm added before the beating of SwBKP showed better results than C-PVAm added after the beating in terms of fines retention, tensile index, and formation. In particular, the tensile index was improved about 7.7 % by adding of C-PVAm 4 % as is before beating of SwBKP. Consequently, it was found that C-PVAm with a high reaction rate can be added before beating of SwBKP to improve the physical strength.
Funding statement: Authors state no funding involved.
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Conflict of interest: The authors declare no conflicts of interest.
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Articles in the same Issue
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- Chemical pulping
- Sodium salt scaling in black liquor evaporators and the effects of the addition of tall oil brine
- Bleaching
- Characterization of fibers after xylanase and modified laccase-glutamate system biobleaching of old newsprint pulp
- Mechanical pulping
- Low-consistency refining of CTMP targeting high strength and bulk: effect of filling pattern and trial scale
- Paper technology
- Model and optimal operational windows for hydrodynamic fiber fractionation
- Paper physics
- Full-field hygro-expansion characterization of single softwood and hardwood pulp fibers
- Paper chemistry
- Selective addition of C-PVAm to improve dry strength of TMP mixed tissue paper
- A transparent polyurethane based on nanosilica in reinforcing papers
- Packaging
- Laboratory measurement method for the mechanical interaction between a tactile sensor and a cartonboard package – presentation and evaluation
- Environmental impact
- Concentrated sulfuric acid production from non-condensable gases and its effect on alkali and sulfur balances in pulp mills
- Recycling
- Characterization of recycled waste papers treated with starch/organophosphorus-silane biocomposite flame retardant
- Nanotechnology
- Effects of lignin content and acid concentration on the preparation of lignin containing nanofibers from alkaline hydrogen peroxide mechanical pulp
- Rice straw paper sheets reinforced with bleached or unbleached nanofibers
- Chemical technology/modifications
- Preparation and characterization of cellulose bromo-isobutyl ester based on filter paper
- Preparation and thermostability of hydrophobic modified nanocrystalline cellulose
- Hardwood kraft pulp fibre oxidation using acidic hydrogen peroxide
Articles in the same Issue
- Frontmatter
- Chemical pulping
- Sodium salt scaling in black liquor evaporators and the effects of the addition of tall oil brine
- Bleaching
- Characterization of fibers after xylanase and modified laccase-glutamate system biobleaching of old newsprint pulp
- Mechanical pulping
- Low-consistency refining of CTMP targeting high strength and bulk: effect of filling pattern and trial scale
- Paper technology
- Model and optimal operational windows for hydrodynamic fiber fractionation
- Paper physics
- Full-field hygro-expansion characterization of single softwood and hardwood pulp fibers
- Paper chemistry
- Selective addition of C-PVAm to improve dry strength of TMP mixed tissue paper
- A transparent polyurethane based on nanosilica in reinforcing papers
- Packaging
- Laboratory measurement method for the mechanical interaction between a tactile sensor and a cartonboard package – presentation and evaluation
- Environmental impact
- Concentrated sulfuric acid production from non-condensable gases and its effect on alkali and sulfur balances in pulp mills
- Recycling
- Characterization of recycled waste papers treated with starch/organophosphorus-silane biocomposite flame retardant
- Nanotechnology
- Effects of lignin content and acid concentration on the preparation of lignin containing nanofibers from alkaline hydrogen peroxide mechanical pulp
- Rice straw paper sheets reinforced with bleached or unbleached nanofibers
- Chemical technology/modifications
- Preparation and characterization of cellulose bromo-isobutyl ester based on filter paper
- Preparation and thermostability of hydrophobic modified nanocrystalline cellulose
- Hardwood kraft pulp fibre oxidation using acidic hydrogen peroxide
