Results 61 to 70 of about 588 (182)

An exploratory evaluation of the pulpability of Brachystegia spiciformis and Pericopsis angolensis from the angolan miombo woodlands

Maderas: Ciencia y Tecnología, 2018
Brachystegia spiciformis and Pericopsis angolensis are two hardwood species found in the Miombo woodlands. The wood features, kraft pulping and strength pulp properties of both species were evaluated in order to determine their potential as raw material
Lino Manuel Vicente Sangumbe, Miguel Pereira, Isabel Carrillo, Regis Teixeira Mendonça   +3 more
doaj  

The Study on Refining of Masson’s Pine Kraft Pulps for Sack Paper

, 2011
High consistency refining (HCR) and low consistency refining (LCR) of unbleached Masson’s pine kraft pulps for sack paper were studied in this article. The properties of their refined pulp and handsheet were analyzed comparatively.
Jia Liang Lan, Le Fan Ma, Fu Ji Wang, Zheng Guo Li, Bian Chu Liu   +4 more
core   +1 more source

The Effect of Ultraviolet Light on the Color of Unbleached Pulps: Literature Survey

, 1959
A literature survey was prepared which covered the published information on the effects of ultraviolet light on the color of unbleached pulps. Experiments were conducted with eight types of unbleached pulp which were converted into optical test pads ...
Brew, David L.
core  

Differences and similarities between kraft and oxygen delignification of softwood fibers : effects on mechanical properties

, 2021
Charged groups in pulp have been shown to enhance the tensile strength of the paper produced from the pulp. Oxygen delignification introduces charged groups and it is of interest to determine how the delignification should be distributed between the ...
Esteves, Claudia,, Östlund, Sören,, Esteves, Cláudia S. V. G.,, Sevastyanova, Olena,, Brännvall, Elisabet,   +4 more
core   +1 more source

HEXENURONIC ACID REMOVAL FROM UNBLEACHED KRAFT EUCALYPTUS PULP BY PEROXYMONOSULFURIC ACID

Journal of the Chilean Chemical Society, 2004
The use of peroxymonosulphuric (Ps) acid to remove hexenuronic acid (HexA) present in unbleached eucalyptus kraft pulps was evaluated here. HexA is formed during pulping and is held responsible for reagent consumption during bleaching. Laboratory experiments, using oxygen predelignified eucalyptus kraft pulps (kappa number around 9), treated at 20-110C
PETIT-BREUILH, XIMENA, ZAROR, CLAUDIO, MELO, ROBERTO   +2 more
openaire   +2 more sources

Impact of extended-impregnation cooking on the xylan structure in Eucalyptus urograndis kraft pulps

Compared to conventional kraft cooking, (CK), extended-impregnation kraft cooking (EIC) gives higher yield of cellulose and xylan. In the present study, the amount of xylan and its degree of substitution (DS) with 4-O-methyl glucuronic acid (MeGlcA) and ...
Lindstrom, Mikael E., Evtuguin, Dmitry, Sevastyanova, Olena, Wedin, Helena, Ragnar, Martin   +4 more
core   +1 more source

Recycling potential of unbleached and bleached chemical pulps from juvenile and mature wood of Populus deltoides

, 2011
The recycling potential of unbleached and bleached pulps of juvenile and mature wood of poplar (namely “eastern cottonwood”, Populus deltoides) has been investigated.
Dehghani Firouzabadi, Mohammad Reza, Seyed Mohammad Hashemi Najafi, Kamyar Salehi, Martin A. Hubbe, Yahya Hamzeh, Mohammad Reza Dehghani Firouzabadi, Hubbe, Martin A., Hashemi Najafi, Seyed Mohammad, Salehi, Kamyar, Hamzeh, Yahya   +9 more
core   +1 more source

PRODUCTION OF DISSOLVING GRADE PULP FROM ALFA

BioResources, 2010
Alfa, also known as Stipa tenacissimaI or “halfa”, is grown in North Africa and south Spain. Due to its short fiber length, paper made from alfa pulp retains bulk and takes block letters well.
Baya Bouiri, Moussa Amrani
doaj  

The role of xylan and glucomannan in yellowing of kraft pulps

, 1995
The effects of xylan and glucomannan on the thermal stability of unbleached, partially bleached, and fully bleached pine and birch kraft pulps were studied.  The choice of bleaching chems. strongly affected the brightness reversion.
Lindblad, Gunnar, Bergnor, Elisabeth, Viikari, Liisa, Buchert, Johanna, Ek, Monica,   +4 more
core  

The Influence of the Composition of Pulp and the Number of Layers on the Strength Properties of Multi-Layer Papers Intended for the Production of Corrugated Paperboard

BioResources
This research investigated the influence of the layered structure of paper on its selected strength properties. Two types of cellulose pulp were used: unbleached kraft pine pulp (UBSK) and unrefined bleached birch kraft pulp (BHK).
Karolina Radomska, Konrad Olejnik, Piotr Pospiech   +2 more
doaj   +2 more sources