Bleached Kraft Pulps from Blends of Wood and Hemp. Part I. Demand for Alkali, Yield of Pulps, Their Fractional Composition and Fibre Properties

Danielewicz, Dariusz; Surma-Ślusarska, Barbara

doi:10.5604/01.3001.0012.7514

Artykuł - szczegóły

Tytuł artykułu

Bleached Kraft Pulps from Blends of Wood and Hemp. Part I. Demand for Alkali, Yield of Pulps, Their Fractional Composition and Fibre Properties

Autorzy

Danielewicz Dariusz , Surma-Ślusarska Barbara

Treść / Zawartość

Pełne teksty:

15_bleached_kraft_pulps_from_blends_of_wood and_hemp_part_fibres_2019_1.pdf

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Identyfikatory

DOI

10.5604/01.3001.0012.7514

Warianty tytułu

Roztwarzanie i bielenie mieszanek drewna i konopi. Część I. Zapotrzebowanie alkaliów, wydajność mas celulozowych, ich skład frakcyjny i właściwości włókien

Języki publikacji

Abstrakty

In the paper, results of the kraft pulping of blends of birch or pine with hemp stalks or a hemp-woody core composed of 80% wood and 20% hemp fibrous raw materials are presented. The unbleached kraft pulps produced were then subjected to oxygen delignification and bleaching in order to obtain bleached kraft pulps. The research performed made it possible to compare the final yield and viscosity of the bleached kraft pulps from raw material blends with those of kraft pulps from birch and pine. The effect of replacing 1/5 of birch or pine with hemp fibrous raw materials on the content of individual fractions of fibres in the bleached pulps, the relative content of fines in them, the average length and width of fibres, its coarseness and the fibres’ deformation indices was also determined. From the study it follows that better effects of replacing a part of wood in the process of production of bleached kraft pulps are achieved with hemp stalks. Blends of wood with this fibrous raw material give a higher final yield of pulps, lower content of fines and higher average fibre length than using blends of wood and a hemp woody-core.

W pracy określono wydajność mas celulozowych w procesie roztwarzania metodą siarczanową mieszanek drewna brzozowego i sosnowego z łodygami konopnymi i drewnikiem konopnym. Uzyskane masy celulozowe niebielone poddano następnie procesom delignifikacji tlenowej i bielenia w celu uzyskania mas w pełni wybielonych. Badania umożliwiły porównanie wydajności końcowej, a także lepkości uzyskanych bielonych mas celulozowych z tymi wskaźnikami bielonych mas brzozowej i sosnowej. Określono również wpływ zastąpienia 1/5 drewna surowcami konopnymi na skład frakcyjny bielonych mas celulozowych, względną zawartość w nich frakcji drobnej, a także długość i szerokość włókien oraz wskaźnik ciężaru jednostki długości włókna. Badania wykazały lepsze efekty zastąpienia drewna łodygami konopnymi. Przerób mieszanek drewna z tym surowcem konopnym umożliwił bowiem uzyskanie wyższej wydajności bielonych mas celulozowych, niższej zawartości w nich frakcji drobnej i wyższej średniej długości włókien w porównaniu z tymi wskaźnikami bielonych mas celulozowych z mieszanek drewna brzozy i sosny z drewnikiem konopnym.

Słowa kluczowe

birch pine wood/hemp blends kraft pulping oxygen delignifiaction bleaching pulps properties fibres properties

drewno brzozowe drewno sosnowe mieszanki drewna/konopi roztwarzanie siarczanowe delignifikacja tlenowa wybielanie właściwości pulpy właściwości włókien

Wydawca

Sieć Badawcza Łukasiewicz - Łódzki Instytut Technologiczny

Czasopismo

Fibres & Textiles in Eastern Europe

Rocznik

2019

Tom

Vol. 27, no. 1 (133)

Strony

112--117

Opis fizyczny

Bibliogr. 56 poz., rys., tab.

Twórcy

autor

Danielewicz Dariusz

dariusz.danielewicz@p.lodz.pl

Lodz University of Technology, Institute of Papermaking and Printing, Fibrous Papermaking Pulps Technology Division, ul. Wolczanska 223, 90-924 Łódź, Poland

autor

Surma-Ślusarska Barbara

Lodz University of Technology, Institute of Papermaking and Printing, Fibrous Papermaking Pulps Technology Division, ul. Wolczanska 223, 90-924 Łódź, Poland

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).

Typ dokumentu

Bibliografia

Identyfikator YADDA

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