Method of quantifying the wet strength of paper
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United States of America Patent
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Jun 10, 1997
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N/A
app pub date -
May 18, 1995
filing date -
May 18, 1994
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Abstract
A method for the quantification of the wet strength of paper in pulp and/or paper, comprising (I) developing a calibration model by (I.a) registering absorption, reflectance or emission spectra of reference samples of known wet strength to develop learning sets; (I.b) processing the spectral raw data, to reduce noise and adjust for drift and diffuse light scatter; (I.c) performing a data analysis by applying chemometric techniques to the processed learning sets; and (II) determining the unknown paper wet strength by registering the absorption, reflectance or emission spectra, in correspondence to (I.a), from the pulp and/or paper of the unknown wet strength; processing the thereby obtained spectral raw data as according to (I.b); and applying the developed calibration model to the processed data. Optionally, a data analysis step as according to (I.c) can also be applied to the processed spectral raw data from the paper having unknown wet strength.
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