Influence of the nature of fiber mass grinding on the quality characteristics of finished paper products

The requirements for different types of paper depend on the field of its application. To obtain finished products with the necessary characteristics, it is important to take into account the properties of the fibrous mass. The milling of sulfate cellulose of coniferous and deciduous wood species was carried out on semi–industrial disc mills (grinding conditions: the concentration of fibrous mass was 1 and 12 %, the degree of grinding varied from 15...60 °C). The time for grinding the fibrous mass at a concentration of 12 % to a grinding degree of 60 °C was required for BSLC by 1.5 times; BSHC by 2.5 times, more than for grinding a mass of low concentration. The paper-forming properties  of the fibrous mass have been determined: the water retention capacity of BSLC increased by 151.4 and 131.4 %;  at BSHC by 138.5 and 115.4 %; fiber length at BSLC decreased by 35.8 and 47.7 %; at BSHC by 28.6 and 37.7 %.  The nature of changes in the mechanical properties of finished paper products depending on the degree of grinding and the nature of grinding is analyzed. It was found that with an increase in the degree of grinding of the fibrous mass from 15 to 60 °C, the following increase: the resistance to penetration of samples from BSLC by 4.6±0.4 times, from BSHC by 7.5±0.5 times; the breaking length of samples from BSLC by 2.5±0.3, from BSHC by 2.7 times. It was found out that the complexity of the process of grinding a mass of high concentration lies in the difficult movement of this mass in the grinding zone.

1. Yurtayeva L. V., Alashkevich Yu. D. Sposob polucheniya mikrokristallicheskoy tsellyulozy na osnove biopovrezhdennoy drevesiny // Khvoynyye boreal'noy zony. 2022. T. 40, № 2. S. 158–163. DOI 10.53374/19930135-2022-6-158-163.

2. Investigation of the possibility of obtaining powdered cellulose using a non-knife method of grinding fibrous semi-finished products / E. V. Kaplyov, L. V. Yurtaeva, R. A. Marchenko, D. Yu. Vasilyeva, Yu. D. Alashkevich // Journal of Physics: Conference Series, Krasnoyarsk, Russia, 24 sentyabrya – 03 2021 goda / Krasnoyarsk Science and Technology City Hall of the Russian Union of Scientific and Engineering Associations. Vol. 2094. Krasnoyarsk, Russia: IOP Publishing Ltd, 2021. P. 42069. DOI 10.1088/1742-6596/2094/4/042069. EDN ZFYKBN.

3. Flyate D. M. Svoystva bumagi. Izd. 3-e, pererabotannoye i dopolnennoye. Moskva : Lesnaya promyshlennost', 1986. 680 s.

4. Vliyaniye nozhevogo sposoba razmola voloknistoy massy na protsess polucheniya poroshkovoy tsellyulozy / Yu. D. Alashkevich, L. V. Yurtayeva, N. S. Reshetova, R. A. Marchenko // Khimiya rastitel'nogo syr'ya. 2020. № 4. S. 493–499. DOI 10.14258/jcprm.2020048121. EDN VMYZAC.

5. Ushakov A. V. Razmol voloknistykh polufabrikatov vysokoy kontsentratsii v tsellyulozno-bumazhnom proizvodstve : dissertatsiya ... kandidata tekhnicheskikh nauk : 05.21.03 / Ushakov Aleksandr Vasil'yevich. Krasnoyarsk, 2022. 173 s.

6. Dinesh F., Gorski D., Sabourin M., Geoffrey D. Characterization of fiber development in high and low – consistency of primary mechanical pulp // Holzforschung. 2013. Pp. 735–745.

7. Kure K. A. On the relationship between process input variables and fibre characteristics in thermomechanical pulping: Doctoral thesis. Trondheim, 1999. 99 p.

8. Hill J., Sabourin M., Aichinger J., Johansson L., Gorski D., Axelsson P. Combining selective bleaching chemistries and ATMP technology for low energy mechanical pulping at higher brightness // 7th International Fundamental Mechanical Pulp. Nanjing, 2010. Р. 164.

9. Alashkevich Yu. D., Kugushev I. D. K voprosu ob issledovanii protsessa razmola bumazhnoy massy na nozhevykh razmalyvayushchikh mashinakh // Kratkiye soobshcheniya / LTI im.Lensoveta. Sektsiya inzhenernoy khimicheskoy tekhniki. L., 1970. S. 13–15.

10. Chichayev V. A. Oborudovaniye tsellyuloznobumazhnogo proizvodstva. T. 1. Moskva : Lesnaya promyshlennost', 1981. 367 s.

11. Alashkevich Yu. D., Seledchik V. V., Kugushev I. D. Gidrodinamika protsessa razmola na nozhevykh razmalyvayushchikh mashinakh // Sbornik trudov / TSNIIB. 1971. Vyp. 6. S. 181–188.

12. Gol'dshtvik M. A. Odno paradoksal'noye resheniye uravneniya Nav'ye-Stoksa // Prikladnaya matematika i mekhanika. 1969. T. 24, vyp. 4. S. 610–622.

13. Bazhenova V. V., Silant'yev B. A. Eksperimental'naya proverka gipotezy postoyanstva zavikhrennosti v zone otryva // Zhurnal prikladnoy mekhaniki i tekhn. fiziki. 1966. № I. S. 120–122.

14. Litvinova M. M., Alashkevich Yu. D., Marchenko R. A. Osobennosti beznozhevogo razmola voloknistykh polufabrikatov iz odnoletnikh rasteniy v tsellyuloznobumazhnom proizvodstve // Khvoynyye boreal'noy zony. 2024. T. 42, № 2. S. 88–94. DOI 10.53374/1993-01352024-2-88-94.

15. Shurkina V. I., Marchenko R. A., Alashkevich Y. D., Research of the paper-forming properties of a fibrous material with the use of a tacking with curvilinear knives. IOP Conference Series: Materials Science and Engineering. 2019. 467(1), 012002.

16. Role of external fibrillation in high-consistency pulp refining / A. Ushakov, Yu. Alashkevich, V. Kozhukhov, R. Marchenko // BioResources. 2023. Vol. 18, No. 3. P. 5494–5511. DOI 10.15376/biores.18.3.5494-5511. EDN CLIRZC.

17. Obrabotka beznozhevym sposobom makulaturnoy massy / L. V. Kutovaya, V. V. Konyukhova, Yu. D. Alashkevich, A. G. Shvedov // Khvoynyye boreal'noy zony. 2008. T. 25, № 3-4. S. 359–361.

18. Yurtayeva L. V., Alashkevich Yu. D., Kaplev Ye. V., Slizikova Ye. A. Vliyaniye razmola odnoletnikh rastitel'nykh polimerov na protsess polucheniya melkodispersnoy tsellyulozy / Khvoynyye boreal'noy zony. 2023. T. 41, № 4. S. 361–368. DOI 10.53374/1993-0135-20234-361-368. EDN AOJLNM.

19. ISO 5267-1:1999/Cor.1:2001. Tsellyuloza. Opredeleniye sposobnosti k obezvozhivaniyu. Chast' 1. Metod Shopper-Riglera. 2001. 8 s.

20. Tekhnologiya i oborudovaniye pererabotki makulatury: uchebnoye posobiye / M. V. Vanchakov, A. V. Kuleshov, A. V. Aleksandrov, A. A. Gauze // VSHTꞏE SPBGUPTD. Sankt-Peterburg., 2019. Chast' III. 139 s.

21. ISO 5269-1:2005 Tsellyuloza. Prigotovleniye laboratornykh listovykh otlivok dlya fizicheskikh ispytaniy. 12 s.

22. ISO 5270:2012 Tsellyuloza. Laboratornꞏyye listy. Opredeleniye fizicheskikh svoystv. 20 s.

23. ISO 1924-2:2008 Bumaga i karton. Metod opredeleniya prochnosti pri rastyazhenii. 19 s.

24. Reyska R. A., Butko Yu. G. Razmol berezovoy sul'fatnoy tsellyulozy vysokoy kontsentratsii. Tekst: neposredstvennyy // Bumazhnaya promyshlennost'. 1972. № 3. S. 4–5.

25. Ivanov S. N. Tekhnologiya bumagi. Izd. 2-e, pererabot. Moskva : Lesnaya promyshlennost', 1970. 720 s. Tekst: neposredstvennyy.

26. Perekal'skiy N. P. Sovremennoye predstavleniye o mekhanicheskikh yavleniyakh pri razmole // Tr. LTI TSBP im. Molotova. M. ; L. : Goslesbumizdat, 1961. Vyp. 8. S. 5–18.

27. Petrova A. A., Alashkevich Yu. D., Voronin I. A. Vliyaniye risunka kombinirovannoy garnitury diskovoy mel'nitsy na otdel'nꞏyye bumagoobrazuyushchiye svoystva voloknistykh polufabrikatov i fiziko-mekhanicheskiye kharakteristiki gotovogo produkta. // Khimiya rastitel'nogo syr'ya. 2023. № 4. S. 429–435. DOI 10.14258/jcprm.20230412552.