Application of improved chemical–mechanical pulp from poplar wood in the packing paper composition

2007 ◽  
Vol 66 (1) ◽  
pp. 75-76 ◽  
Author(s):  
Nelly Georgieva ◽  
R. Boeva-Spiridonova ◽  
I. Spiridonov ◽  
E. Petkova ◽  
L. Yotova
Keyword(s):  
Poplar Wood ◽  
Mechanical Pulp

scholarly journals Utilization of a chemical-mechanical pulp with improved properties from poplar wood in the composition of packing papers

BioResources ◽  
2007 ◽  
Vol 2 (1) ◽  
pp. 34-40
Author(s):  
R. Boeva-Spiridonova ◽  
E. Petkova ◽  
N. Georgieva ◽  
L. Yotova ◽  
I. Spiridonov
Keyword(s):  
Optical Properties ◽  
Phanerochaete Chrysosporium ◽  
Manganese Peroxidase ◽  
Electricity Consumption ◽  
Enzyme Treatment ◽  
Preliminary Treatment ◽  
Poplar Wood ◽  
Mechanical Pulp ◽  
Hardwood Pulp ◽  
Fiber Materials

The aim of the present work is to obtain a chemical-mechanical pulp (CMP) from poplar wood with improved properties, to be used in packing papers in place of more expensive softwood or hardwood pulp. For improving the CMP quality indicators, a preliminary treatment of the pulp has been carried out with a mixture of oxidizing enzymes produced from Phanerochaete chrysosporium, including lignin peroxidase, manganese peroxidase, and laccase. The two types of fiber materials obtained were double-stage bleached and then ground to 30oSR. It was found that preliminary enzyme treatment yielded CMP with improved physical, mechanical, and optical properties. The enzyme-pretreated CMP also refined faster, thus reducing the electricity consumption. Bleached CMP from poplar wood, obtained after preliminary enzyme treatment, could be successfully utilized at levels up to 40% in the composition of various packaging papers.

Research on Preparation and Properities of Chemi-Mechanical Pulp from the Waste Poplar Wood

2013 ◽  
Vol 848 ◽  
pp. 325-329
Author(s):  
Xia Li ◽  
Chuan Shan Zhao ◽  
Jin Jin Yu ◽  
Wen Jia Han
Keyword(s):  
Optimal Time ◽  
Optimal Dosage ◽  
Poplar Wood ◽  
Fiber Morphology ◽  
Strength Index ◽  
Mechanical Pulp ◽  
Tear Index ◽  
Length Width ◽  
Normal Atmospheric Pressure ◽  
Crush Strength

In this study, we prepared unbleached chemi-mechanical pulp from waste poplar wood using alkaline processing under normal atmospheric pressure. The influnce of alkaline dosage and time to fiber morphology and properties of the paper were discussed. The parameters of fiber including the length ,width and curl index were measured by FQA. The optimal dosage of NaOH and the optimal time of soaking period in the preparation of pulp using waste poplar wood were studied. The results showed that the optimal dosage of NaOH was 6% and the time of soaking period was one day. The performance of the handsheet made from the poplar wood under the pulping conditions are as follows: tensile strength index of 27 N·m/g, tear index of 0.51 mN·m2/g, burst index of 1.7 KPa·m2/g, folding strength of 16 times, ring crush strength index of 5.7 N.m/g, whiteness of 55.5 ISO, white opacity of 97%, paper absorption liquid rate of 0.32 mm/s.

Alkaline Chemi-Mechanical Pulp from Poplar. Relationship between Chemical State, Swelling and Papermaking Properties

Holzforschung ◽  
2003 ◽  
Vol 57 (5) ◽  
pp. 489-495 ◽  
Author(s):  
M. Zanuttini ◽  
V. Marzocchi
Keyword(s):  
Great Part ◽  
Chemical State ◽  
Alkali Concentration ◽  
Poplar Wood ◽  
Factorial Experimental Design ◽  
Ion Content ◽  
Limited Effect ◽  
Mechanical Pulp ◽  
Consistency Results ◽  
Disk Mill

Summary In order to analyse the fundamentals of alkaline chemi-mechanical pulping of hardwoods, the chemical state of the wood was related to both the swelling level of fibres and the papermaking properties of pulp. Wafers of poplar wood were alkali treated following a factorial experimental design for two variables: temperature and alkali concentration. Treated wafers were hot defibrated in a 300-mm disk mill at 15% consistency, and then refined in PFI mill at 20% consistency. Results show how fibre swelling gradually increases as alkaline action is increased. The significant improvement in tensile and tear strength of the pulp can, in great part, be ascribed to the development of fibre bonding capacity. A limited effect of ion content on cell wall swelling was found. Swelling correlates well with deacetylation level, and is a major factor in determining the tensile strength and scattering ability of the pulp.

Understanding the risks and rewards of using 50% vs. 10% strength peroxide in pulp bleach plants

TAPPI Journal ◽  
2018 ◽  
Vol 17 (11) ◽  
pp. 601-607
Author(s):  
Alan Rudie ◽  
Peter Hart
Keyword(s):  
Hydrogen Peroxide ◽  
Reaction Rate ◽  
The Other ◽  
Mechanical Pulp ◽  
Engineering Controls ◽  
Point Of Use ◽  
Process Failure

The use of 50% concentration and 10% concentration hydrogen peroxide were evaluated for chemical and mechanical pulp bleach plants at storage and at point of use. Several dangerous occurrences have been documented when the supply of 50% peroxide going into the pulping process was not stopped during a process failure. Startup conditions and leaking block valves during maintenance outages have also contributed to explosions. Although hazardous events have occurred, 50% peroxide can be stored safely with proper precautions and engineering controls. For point of use in a chemical bleach plant, it is recommended to dilute the peroxide to 10% prior to application, because risk does not outweigh the benefit. For point of use in a mechanical bleach plant, it is recommended to use 50% peroxide going into a bleach liquor mixing system that includes the other chemicals used to maintain the brightening reaction rate. When 50% peroxide is used, it is critical that proper engineering controls are used to mitigate any risks.

Mechanical Pulp & Non-wood Fiber. Outline of Mechanical Pulp.

1998 ◽  
Vol 52 (9) ◽  
pp. 1145-1158
Author(s):  
Sakujiro Oka
Keyword(s):  
Wood Fiber ◽  
Mechanical Pulp

The behavior of chromophoric structures in softwood mechanical pulp on bleaching with alkaline hydrogen peroxide

2006 ◽  
Vol 21 (3) ◽  
pp. 359-364 ◽  
Author(s):  
Eva Svensson Rundlöf ◽  
Eric Zhang ◽  
Liming Zhang ◽  
Göran Gellerstedt
Keyword(s):  
Hydrogen Peroxide ◽  
Alkaline Hydrogen Peroxide ◽  
Mechanical Pulp

Investigation of low consistency reject refining of mechanical pulp for energy savings - OPEN ACCESS

2018 ◽  
Vol 33 (01) ◽  
pp. 017-022
Author(s):  
Francisco J. Fernandez ◽  
D. Mark Martinez ◽  
James A. Olson
Keyword(s):  
Open Access ◽  
Energy Savings ◽  
Mechanical Pulp

Paper Chemistry: Interactions of thermo mechanical pulp fractions with high molar mass cationic polyacrylamides: Part 2. Flocculation

2010 ◽  
Vol 25 (3) ◽  
pp. 310-318 ◽  
Author(s):  
Tero Taipale ◽  
Janne Laine ◽  
Susanna Holappa ◽  
Jonni Ahlgren ◽  
Juan Cecchini
Keyword(s):  
Molar Mass ◽  
High Molar Mass ◽  
Mechanical Pulp ◽  
Paper Chemistry

scholarly journals Study on Properties of Flame-Retardant Plywood Made with Eucalyptus, Birch and Poplar Wood

2021 ◽  
Vol 1885 (2) ◽  
pp. 022053
Author(s):  
Chaolu Yin ◽  
Xiang Zhang ◽  
Pingli Li ◽  
Fuxin Fu
Keyword(s):  
Flame Retardant ◽  
Poplar Wood

scholarly journals A Superhydrophobic, Antibacterial, and Durable Surface of Poplar Wood

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1885
Author(s):  
Xinyu Wu ◽  
Feng Yang ◽  
Jian Gan ◽  
Zhangqian Kong ◽  
Yan Wu
Keyword(s):  
Stearic Acid ◽  
Antibacterial Properties ◽  
Alkali Resistance ◽  
Poplar Wood ◽  
X Ray Diffraction ◽  
X Ray ◽  
Different Temperatures ◽  
Acid And Alkali Resistance ◽  
The Stability

The silver particles were grown in situ on the surface of wood by the silver mirror method and modified with stearic acid to acquire a surface with superhydrophobic and antibacterial properties. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and X-ray energy spectroscopy (XPS) were used to analyze the reaction mechanism of the modification process. Scanning electron microscopy (SEM) and contact angle tests were used to characterize the wettability and surface morphology. A coating with a micro rough structure was successfully constructed by the modification of stearic acid, which imparted superhydrophobicity and antibacterial activity to poplar wood. The stability tests were performed to discuss the stability of its hydrophobic performance. The results showed that it has good mechanical properties, acid and alkali resistance, and UV stability. The durability tests demonstrated that the coating has the function of water resistance and fouling resistance and can maintain the stability of its hydrophobic properties under different temperatures of heat treatment.

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