Method of quantifying the properties of paper

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United States of America Patent

PATENT NO 5680321
SERIAL NO

08443667

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A method for the quantification of the one or several of the physical properties selected from dry tensile strength, hydrophobicity, debonding energy, bursting strength, wettability and printability of pulp and/or paper which method comprises (I) developing a calibration model by (I.a) registering absorption, reflectance or emission spectra of reference samples of paper of known properties as defined above 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 properties as defined above of pulp and/or paper by registering the absorption, reflectance or emission spectrum, in correspondence to (I.a), from the pulp and/or paper having unknown properties; 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 properties.

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Patent OwnerAddress
EKA CHEMICALS AB445 80 BOHUS

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Helmer, Ulla Solna, SE 5 86
Olsson, Ralf Stockholm, SE 3 65
Renberg, Lars Vasterhaninge, SE 5 150

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