| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Retulainen, Elias
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2020Understanding Extensibility of Paper:Role of Fiber Elongation and Fiber Bondingcitations
- 2019Understanding Extensibility of Paper:Role of Fiber Elongation and Fiber Bonding
- 2018The effect of oxyalkylation and application of polymer dispersions on the thermoformability and extensibility of papercitations
- 2018Stress–strain curve of single pulp fibres and paper
- 2017Measurement of Thermoplastic Properties of Packaging Materials
- 2017Recycled fibres and fibre sludge as reinforcement materials in injection moulded PP and PLA compositescitations
- 2016Recycled fibres and fibre sludge as reinforcement materials in injection molded composites
- 2016Effect of polyurethane addition on the strength, extensibility and 3D formability of paper and board
- 2016Improving the extensibility of thermoformable web structures with polymer dispersions
- 2016Combined mechanical and chemical modifications towards super-stretchable paper-based materials
- 2015The influence of strain rate and pulp properties on the stress-strain curve and relaxation rate of wet paper
- 2012The effects of guar gum on wet web runnability:Laboratory and pilot-scale studies
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conferencepaper
Effect of polyurethane addition on the strength, extensibility and 3D formability of paper and board
Abstract
The extensibility and strength of fibre networks can be improved by modifying fibre material mechanically and by adding of polymers. Polyurethane (PU) is known to have interesting properties, like high extensibility. It was found, that the polyurethane dispersions can be effectively added to wet and dry paper by spraying on, as well as by wet-end addition to pulp suspension. In the wet end addition the retention of PU in paper is quite poor; however, it can be improved by fixing of PU by using a low molecular weight highly charged polymer. The improvements in extensibility increase with the amount of polyurethane retained in paper. However, considering the high extensibility (450%) of polyurethane the stiffness of the fibres and fibre network dominate the result. The adhesion of PU with paper, and the softening behavior (by DMTA tests), and surface energy measurements suggest that the compatibility of PU and kraft pulp could be better. Improvements are assumed to be due to the reasonable adhesion to fibres and thus fibres are connected by a material that has higher compliance than cellulosic material. The respective increase in extensibility was accompanied by relevant improvements in 2D- and 3D-formability.