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Online quality evaluation of tissue paper structure on new generation tissue machines

Research output: Contribution to journalArticleScientificpeer-review

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Online quality evaluation of tissue paper structure on new generation tissue machines. / Raunio, Jukka-Pekka; Löyttyniemi, Tommi; Ritala, Risto.

In: Nordic Pulp and Paper Research Journal, Vol. 33, No. 1, 26.03.2018, p. 133-141.

Research output: Contribution to journalArticleScientificpeer-review

Harvard

Raunio, J-P, Löyttyniemi, T & Ritala, R 2018, 'Online quality evaluation of tissue paper structure on new generation tissue machines', Nordic Pulp and Paper Research Journal, vol. 33, no. 1, pp. 133-141. https://doi.org/10.1515/npprj-2018-3004

APA

Raunio, J-P., Löyttyniemi, T., & Ritala, R. (2018). Online quality evaluation of tissue paper structure on new generation tissue machines. Nordic Pulp and Paper Research Journal, 33(1), 133-141. https://doi.org/10.1515/npprj-2018-3004

Vancouver

Raunio J-P, Löyttyniemi T, Ritala R. Online quality evaluation of tissue paper structure on new generation tissue machines. Nordic Pulp and Paper Research Journal. 2018 Mar 26;33(1):133-141. https://doi.org/10.1515/npprj-2018-3004

Author

Raunio, Jukka-Pekka ; Löyttyniemi, Tommi ; Ritala, Risto. / Online quality evaluation of tissue paper structure on new generation tissue machines. In: Nordic Pulp and Paper Research Journal. 2018 ; Vol. 33, No. 1. pp. 133-141.

Bibtex - Download

@article{136ad0449c2641dab34d0770070bb18f,
title = "Online quality evaluation of tissue paper structure on new generation tissue machines",
abstract = "At present, the tissue paper manufacturing is mostly based on the dry crepe technology. During the last decade, the manufacturers have introduced new tissue machines concepts that increase the softness, bulk, and absorption capacity. Such machines produce a strong regular three-dimensional (3D) structure to the sheet before the Yankee cylinder. At present, the quality of the 3D structure is not evaluated, or it is evaluated only subjectively at the mill. This is mostly because of the difficulties to separate reliably the regular 3D pattern from other variations. This paper introduces a frequency analysis based method which separates the surface profile variances in tissue paper to the creping, to the regular 3D pattern and to the residual variation. The 3D surface profiles and their variances were determined online with the photometric stereo method. We show that the introduced analysis method evaluates the variance portions reliably and the results are consistent with the visual perception of the 3D surfaces. In one particular product, the regular 3D pattern explains 74 {\%} of total surface variance; the creping explains 10 {\%} and residual variations 16 {\%}. Furthermore, the creping and residual variances are quite stable over time whereas the variance of the regular 3D pattern fluctuates significantly.",
keywords = "frequency analysis, photometric stereo, regular 3D structure, tissue paper",
author = "Jukka-Pekka Raunio and Tommi L{\"o}yttyniemi and Risto Ritala",
year = "2018",
month = "3",
day = "26",
doi = "10.1515/npprj-2018-3004",
language = "English",
volume = "33",
pages = "133--141",
journal = "Nordic Pulp and Paper Research Journal",
issn = "0283-2631",
publisher = "SPCI",
number = "1",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Online quality evaluation of tissue paper structure on new generation tissue machines

AU - Raunio, Jukka-Pekka

AU - Löyttyniemi, Tommi

AU - Ritala, Risto

PY - 2018/3/26

Y1 - 2018/3/26

N2 - At present, the tissue paper manufacturing is mostly based on the dry crepe technology. During the last decade, the manufacturers have introduced new tissue machines concepts that increase the softness, bulk, and absorption capacity. Such machines produce a strong regular three-dimensional (3D) structure to the sheet before the Yankee cylinder. At present, the quality of the 3D structure is not evaluated, or it is evaluated only subjectively at the mill. This is mostly because of the difficulties to separate reliably the regular 3D pattern from other variations. This paper introduces a frequency analysis based method which separates the surface profile variances in tissue paper to the creping, to the regular 3D pattern and to the residual variation. The 3D surface profiles and their variances were determined online with the photometric stereo method. We show that the introduced analysis method evaluates the variance portions reliably and the results are consistent with the visual perception of the 3D surfaces. In one particular product, the regular 3D pattern explains 74 % of total surface variance; the creping explains 10 % and residual variations 16 %. Furthermore, the creping and residual variances are quite stable over time whereas the variance of the regular 3D pattern fluctuates significantly.

AB - At present, the tissue paper manufacturing is mostly based on the dry crepe technology. During the last decade, the manufacturers have introduced new tissue machines concepts that increase the softness, bulk, and absorption capacity. Such machines produce a strong regular three-dimensional (3D) structure to the sheet before the Yankee cylinder. At present, the quality of the 3D structure is not evaluated, or it is evaluated only subjectively at the mill. This is mostly because of the difficulties to separate reliably the regular 3D pattern from other variations. This paper introduces a frequency analysis based method which separates the surface profile variances in tissue paper to the creping, to the regular 3D pattern and to the residual variation. The 3D surface profiles and their variances were determined online with the photometric stereo method. We show that the introduced analysis method evaluates the variance portions reliably and the results are consistent with the visual perception of the 3D surfaces. In one particular product, the regular 3D pattern explains 74 % of total surface variance; the creping explains 10 % and residual variations 16 %. Furthermore, the creping and residual variances are quite stable over time whereas the variance of the regular 3D pattern fluctuates significantly.

KW - frequency analysis

KW - photometric stereo

KW - regular 3D structure

KW - tissue paper

U2 - 10.1515/npprj-2018-3004

DO - 10.1515/npprj-2018-3004

M3 - Article

VL - 33

SP - 133

EP - 141

JO - Nordic Pulp and Paper Research Journal

JF - Nordic Pulp and Paper Research Journal

SN - 0283-2631

IS - 1

ER -