Method and apparatus for measuring fiber properties
AssigneePulp and Paper Research Institute of Canada
InventorHo Fan Jang
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Abstract
The invention relates to a fluorescence microscopy technique for measuring physical and chemical properties of individual fiber-like particles. Fluorescence intensity per unit length is shown to be proportional to the fiber coarseness. In addition, other fiber properties such as fiber length, width and wall thickness can be obtained from fluorescence images, and lignin content from fluorescence spectra. The present invention will provide a process for determining the uniformity of pulp samples in terms of the physical and chemical properties of the individual fiber-like particles, particularly wood pulp fibers.
Claims11
A method of determining a physical property of wood pulp comprising:
- a) applying excitation light at at least one predetermined wavelength to wood pulp, to produce fluorescence emission light from individual fibre particles of said pulp,
- b) detecting fluorescence intensity of said fluorescence emission light, for each said predetermined wavelength, and
- c) determining a physical property of individual fibre particles of the wood pulp from said fluorescence intensities.
An apparatus for determining a physical property of wood pulp comprising:
- i) means to apply excitation light at at least one predetermined wavelength to wood pulp, to produce fluorescence emission light from individual fibre particles of the wood pulp,
- ii) detection means for detecting fluorescence intensity of the fluorescence emission light for each predetermined wavelength, and
- iii) means for determining a physical property of individual fibre particles of the wood pulp from the fluorescence intensities.
Dependencies are inferred from the claim text.