An investigation of friction mechanisms of paper-to-paper friction of coated papers
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Peter Rättö
Abstract
Different friction mechanisms for coated board were investigated. Friction due to adhesive forces, interlocking of asperities and plastic deformation, respectively, was evaluated for coated board. The measurements of friction were combined with measurements of surface energy and measurements of gloss variations. The samples coated with only latex showed significant frictional forces but no signs of polishing or plastic deformation. Friction seemed here to depend on adhesive forces and a correlation could be observed between the surface energy and the coefficients of friction. Adhesive forces seemed to be of less importance for coatings with normal binder content. Increases in gloss variations indicated that friction was partly due to plastic deformation resulting from polishing. Samples calendered at room temperature showed clear signs of polishing while samples calendered at increased temperatures showed little or no polishing. These samples were probably too smooth on a particle level to create wear on each other during friction measurements. The base substrate, on the other hand, did not seem to have any influence on friction, and it was thus concluded that friction depended mostly on asperities on a particle size scale and plastic deformation due to polishing.
© 2018 by Walter de Gruyter Berlin/Boston
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Artikel in diesem Heft
- Extraction and chemical characterization of Norway spruce inner and outer bark
- Hot-water extraction and characterization of spruce bark non-cellulosic polysaccharides
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- Improved quality of SC magazine paper through enhanced fibre development using the ATMP process
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- Brightness development of a hydrogen peroxide bleached spruce TMP. Comparisons of pre-treatments with DTPA and a separable chelating surfactant
- Pressurised compressive chip pre-treatment of Norway spruce with a mill scale Impressafiner
- Relating ink solvent-coating component thermal properties to smearing and development of abrasion resistance in ink jet printing
- Effect of coating formulations and drying methods on the coverage and smoothness of brown grade base papers
- Improvement of the retention-formation relationship using three-component retention aid systems
- The development of hydrophobised ground calcium carbonate particles for the effective adsorption of dissolved and colloidal substances (DCS) from thermo mechanical pulp (TMP) filtrates
- The effect of fibre properties, fines content and surfactant addition on dewatering, wet and dry web properties
- Online detection of moisture in heatset printing: Liquid transfer to printed image and non-image areas
- An investigation of friction mechanisms of paper-to-paper friction of coated papers
- The effects of TMP and filler stratifying on wet web runnability and end product quality of fine paper
- Modelling of fibre orientation probability distribution in the jet-to-wire impingement
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