Using Non-Destructive Methods of Kraft Liner Quality Control

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UDС

676.274

DOI:

10.17238/issn0536-1036.2016.3.157

Abstract

The paper presents the results of the comparative evaluation of the magnitude and variation of the physical and mechanical characteristics of the cardboard-liner, using destructive and non-destructive measurement methods. The samples of kraft-liner – the slices from a spool – of the weight of 115, 140 and 170 g/m2 and the length of 6300 mm selected at a cardboard machine were measured. The mechanical properties profiles were obtained: thickness, burst strength, SCT, bending stiffness, and the characteristics measured by the non-destructive ultrasound method with the Lorentzen&Wettre TSO-tester and by the optical method with the use of the PTA-Line Formation Tester. The variation of mechanical characteristics is considerably (4–8 fold) higher at a low degree of the thickness variability (coefficient of variation 1.6...3.7 %) and the cardboard tensile stiffness index in the machine direction (2.1...2.9 %) across the width of a cardboard machine. The reason is in the high structural imperfection. The variation of all characteristics increases when a weight of 1 m2 of card-board decreases. According to the profiling of the characteristics across the width of the CM we have established, that the variation of burst strength, compression strength and bending stiffness consists of the variation of the formation index (by the nearly points), and the var-iation of the thickness and tensile stiffness (dependence on the position of the point across the width of the CM). In order to reduce the variation of the mechanical properties it is not enough to control only the basic weight of 1m2, humidity and thickness, as well as to control the TSO-angle, but it is necessary to operate by the formation quality and plan the measures to reduce the paper pulp flocculating and jets at the headbox. According to the results of the correlation analysis we confirm the existence of the relationship between the standard phys-ical and mechanical properties and the characteristics determined by the non-destructive methods. The obtained results suggest the possibility of the predictability of the burst strength resistance values, bending stiffness and SCT of kraft liner on the basis of not only measuring the thickness and TSI profile, but also the structural imperfection of cardboard, estimated by the formation analyzer. All the original data can be obtained by the non-destructive methods and in the future with the use of the on-line measurement technologies. The results will improve the accuracy of the assessment of the cardboard quality.

Authors

O.S. Belyaev1, Postgraduate Student, Management Engineer Ya.V. Kazakov2, Doctor of Engineering Sciences, Professor

Affiliation

1Arkhangelsk Pulpand Paper Mill, Melnikov str., 1, Novodvinsk, 164900, Arkhangelsk region, Russian Federation; е-mail: boset@atnet.ru
2Northern (Arctic) Federal University named after M.V. Lomonosov, Naberezhnaya Severnoy Dviny, 17, Arkhangelsk, 163002, Russian Federation; е-mail: j.kazakov@narfu.ru

Keywords

cardboard, properties variation, stiffness, formation, anisotropy.

References

1. Beloglazov V.I., Gur'ev A.V., Komarov V.I. Anizotropiya deformativnosti i prochnosti tarnogo kartona i metody ee otsenki [Anisotropy of Deformability and Strength of Container Board and Methods of Its Evaluation]. Arkhangelsk, 2005. 252 p.
2. Belyaev O.S., Kazakov Ya.V., Mikhaylova O.S. Vzaimosvyaz' makrostruktury i fiziko-mekhanicheskikh svoystv kartona [Interrelation of the Macrostructure and Physical and Mechanical Properties of Cardboard]. Vestnik Kazanskogo tekhnologicheskogo universi-teta, 2014, vol. 17, no. 23, pp. 47–50.
3. Vaysman L.M. Struktura bumagi i metody ee kontrolya [Paper Structure and Methods of Its Control]. Moscow, 1973. 152 p.
4. GOST R 53207–2008. Karton dlya ploskikh sloev gofrirovannogo kartona. Tekhnicheskie usloviya [State Standard R 53207–2008. Cardboard for Flat Layers of Corru-gated Cardboard. General Specifications]. Moscow, 2009. 15 p.
5. Gur'ev A.V., Komarov V.I., Beloglazov V.I. Opyt ispol'zovaniya TSO-testera dlya korrektsii tekhnologicheskogo rezhima KDM [Experience in Using TSO-Tester to Correct the Technological Mode of Cardboard Machine]. Tekhnologiya pererabotki makulatury: materialy 6-y Mezhdunar. nauch.-tekhn. konf. [Proc. 6th Intern. Conf. “Technology of the Wastepaper Processing”]. Karavaevo-Pravdinsky, 2005, pp. 136–138.
6. Kazakov Ya.V., Zelenova S.V., Komarov V.I. Vliyanie opticheskoy neodnorod-nosti struktury na deformatsionnye i prochnostnye kharakteristiki pische-pechatnoy bumagi [Effect of Optical Structural Imperfection on the Deformation and Strength Characteristics of the Writing and Printing Paper]. Lesnoy i khimicheskiy kompleksy – problemy i resheni-ya: sb. st. po materialam Vseros. nauch.-tekhn. konf., posvyashchennoy 75-letiyu SibGTU [Proc. All-Russ. Sci. Eng. Conf., Dedicated to the 75th Anniversary of the Siberian State Technological University “Forest and Chemical Complexes – Challenges and Solutions”]. Krasnoyarsk, 2005, vol. I, pp. 172–176.
7. Kazakov Ya.V., Zelenova S.V., Komarov V.I. Vliyanie neodnorodnosti struktury na kharakteristiki zhestkosti kartonov-laynerov [Influence of Structural Imperfection on the Stiffness Characteristics of Linerboards]. Lesnoy zhurnal, 2007, no. 3, pp. 110–121.
8. Komarov V.I., Beloglazov V.I., Gur'ev A.V., Sysoeva N.V. Issledovanie faktorov, vliyayushchikh na anizotropiyu zhestkosti pri rastyazhenii kartona-laynera [A Study of Factors Affecting the Tensile Stiffness Anisotropy of Linerboard]. Tekhnologiya pererabotki maku-latury: materialy 6-y Mezhdunar. nauch.-tekhn. konf. [Proc. 6 th Intern. Sci. Eng. Conf. “Tech-nology of the Wastepaper Processing”]. Karavaevo-Pravdinsky, 2005, pp. 133–136.
9. Komarov V.I., Gur'ev A.V., El'kin V.P. Mekhanika deformirovaniya tsellyuloz-nykh taroupakovochnykh materialov [Mechanics of Deformation of the Cellulose Packaging Materials]. Arkhangelsk, 2002. 171 p.
10. Lindblad G., Yukha Yu.S. Nastroyka BDM dlya optimizatsii prochnostnykh svoystv kartona dlya ploskikh sloev gofrirovannogo kartona i bumagi dlya gofrirovaniya s pomoshch'yu analiza na TSO-testere [PM Setting to Optimize the Cardboard Strength Prop-erties for Flat Layers of Corrugated Cardboard and Paper for Corrugating with the Analysis at the TSO Tester]. Problemy mekhaniki tsellyulozno-bumazhnykh materialov: materialy I Mezhdun. nauch.-tekhn. konf. [Proc. 1st Sci. Eng. Intern. Conf. “The Issues in Mechanics of the Pulp-and-Paper Materials”]. Arkhangelsk, 2011, pp. 78–87.
11. Kazakov Ya.V., Abramova V.V. Programma dlya kolichestvennoy otsenki neod-norodnosti struktury bumagi na prosvet (Analizator formovaniya) [The Program of Quanti-tative Evaluation of Paper Structural Imperfection UP to the Light (Formation Tester)]. Cer-tificate of Computer Software Registration, no. 2012612685, 2012.
12. Smolin A.S., Aksel'rod G.Z. Tekhnologiya formovaniya bumagi i kartona [Tech-nology of Paper and Cardboard Forming]. Moscow, 1984. 121 p.
13. Bernie J.P. Measuring Formation of Paper – PaperPerfect Method – Lo-rentzen&Wettre. Sweden. 2004. 25 p.
14. Lab Formation Sensor 2D FSensor. Available at: http://www.techpap.com/lab-formation-sensor,lab-device,6.html (accessed 18.05.2015).
15. Lindblad G., F?rst T. The Ultrasonic Measuring Technology on Paper and Board. Lorentzen&Wettre, Elanders Tofters AB. Sweden, 2001. 100 p.
Received on November 05, 2015