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Automated 3D measurement of fiber cross section morphology in handsheets

  • Christian Lorbach , Ulrich Hirn EMAIL logo , Johannes Kritzinger und Wolfgang Bauer
Veröffentlicht/Copyright: 9. November 2018
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Abstract

We present a method for 3D measurement of fiber cross sectional morphology from handsheets. An automated procedure is used to acquire 3D datasets of fiber cross sectional images using an automated microtome and light microscopy. The fiber cross section geometry is extracted using digital image analysis. Simple sample preparation and highly automated image acquisition and image analysis are providing an efficient tool to analyze large samples. It is demonstrated that if fibers are tilted towards the image plane the images of fiber cross sections are always larger than the true fiber cross section geometry. In our analysis the tilting angles of the fibers to the image plane are measured. The resulting fiber cross sectional images are distorted to compensate the error due to fiber tilt, restoring the true fiber cross sectional shape. We use an approximated correction, the paper provides error estimates of the approximation. Measurement results for fiber wall thickness, fiber coarseness and fiber collapse are presented for one hardwood and one softwood pulp.

Published Online: 2018-11-09
Published in Print: 2012-05-01

© 2018 by Walter de Gruyter Berlin/Boston

Artikel in diesem Heft

  1. Contents
  2. Towards optimal defibration: Energy reduction by fatiguing pre-treatment
  3. Flow conditions in the grooves of a Low-Consistency refiner
  4. Multiphase simulation of fiber suspension flows using immersed boundary methods
  5. New insights into retention aids dosage and mixing
  6. Mechanical retention – Influence of filler floc size and grammage of the fibre web
  7. Influence of the history of loading during beating on the evolution of the drainage resistance (SR)
  8. Numerical Investigation of Paperboard Forming
  9. Exceptional pore size distribution in foam-formed fibre networks
  10. Evaluation of the Scott bond test method
  11. Testing of individual fiber-fiber joints under biaxial load and simultaneous analysis of deformation
  12. Towards 3D analysis of pulp fibre networks at the fibre and bond levels
  13. 3D network simulations of paper structure
  14. Automated 3D measurement of fiber cross section morphology in handsheets
  15. The number of contacts in random fibre networks
  16. Modeling the rheology of nanocellulose suspensions
  17. Mechanical properties of cellulose nanofibrils determined through atomistic molecular dynamics simulations
  18. Evaluation of the stress-strain properties in the thickness direction - particularly for thin and strong papers
  19. Investigation of sample-size effects on in-plane tensile testing of paperboard
  20. Use of the efficiency factor to account for previous straining on the tensile behavior of paper
  21. Optical measurement of deformation of paper under tensile load
  22. Stress-strain curve of paper revisited
  23. Analysis of the plastic and elastic energy during the deformation and rupture of a paper sample using thermography
  24. Fibre deformations induced by different mechanical treatments and their effect on zero-span strength
  25. Application and interpretation of zero and short-span testing on nanofibre sheet materials
  26. An analytic procedure for determination of fracture toughness of paper materials
  27. Engineering fracture mechanics analysis of paper materials
  28. Time-dependent, stochastic failure of paper and box
  29. Simulation of creping pattern in tissue paper
  30. The effects of process variables for GCC pre-flocculation on floc and handsheet properties
  31. The effect of MFC on the pressability and paper properties of TMP and GCC based sheets
  32. Modeling and simulation of paperboard edge wicking
  33. Edge-wicking: Micro-fluidics of two-dimensional liquid penetration into porous structures
  34. Mass transfer of water vapor, carbon dioxide and oxygen on modified cellulose fiber-based materials
  35. Fluorescence model for multi-layer papers using conventional spectrophotometers
  36. A partial explanation of the dependence between light scattering and light absorption in the Kubelka-Munk model
  37. Significance of surface and bulk light scattering in microgloss and microgloss nonuniformity of coated papers: Influence of pigment characteristics and calendering conditions
  38. Dependence between paper properties and spectral optical response of uncoated paper
  39. Fold cracking of coated paper: The effect of pulp fiber composition and beating
  40. Effects of coating formulation on coating thermal properties and coated paper print quality in xerography
  41. Uniformity of liquid absorption by coatings - Technique and impact of coating composition
  42. Specks masking by the coating layer in coated paper made from deinked pulp
  43. Use of paper-making techniques for the production of Li-ion paper-batteries
  44. Contacting paper-based supercapacitors to printed electronics on paper substrates
  45. Supercapacitors with graphene coated paper electrodes
  46. Conductivity of inkjet-printed PEDOT:PSS-SWCNTs on uncoated papers
  47. Dynamics of moisture interaction with polyelectrolyte multilayers containing nanofibrillated cellulose
  48. Anisotropic light propagation in paper
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