|Clonal Plantation of Eucalyptus
- Selection of Plus Trees and Trial Plantation -
Forestry Research Institute, Research & Development Division,
Oji Paper Co., Ltd.
@Oji Paper has established over 135,000ha of hardwood plantation
overseas to secure its own resources in accordance with environmental
Forestry Research Institute has established its branches in July
2002 in Australia where there are four plantation projects, to improve
their productivity of hardwood plantation sites mainly by pursuing
clonal forestation with plus trees. Firstly, candidates of the plus
tree were selected by growth characteristics (height, diameter, stem
form and so on) from several plantation sites where there are much
difference in rain fall and edaphic condition. It is very important
to improve not only growth but also wood quality from the view point
of increasing pulp quantity produced from a unit area of plantation.
Therefore, analysis of wood quality has been carried out to get plus
trees with superior wood quality as well as growth. It was clearly
shown that there were great differences of basic density among selected
trees with better performance of growth. Trial plantation has been
established at two sites in August 2004 using plus trees with better
performance of growth and wood quality to study environmental variation.
The Latest Energy Saving Process for Secondly Fiber Treatment
- The Energy Saving Possibility with Newly Developed Technology
Aikawa Iron Works Co., Ltd.
@The Pulping, the Screening, and the Refining section. These three
sections need especially big energy consumption in a secondly-fiber
treating process. Aikawa Iron Works developed new facilities in
these three sections which would be keys for global energy-saving
needs. In this paper, we would like to explain these new facilities & system
and introduce the energy-saving possibility.
New Modified Starch for Surface Size Press
Research and Development Laboratory, Oji Cornstarch Co., Ltd.
@The characterizations of new modified starches for surface size
press were indicated in this report. The starches named GRS series
were decrease of retrogradation, and sizing degree of paper coated
with GRS series was become higher than with oxidized starch.
@As a result, size pressed paper with GRS series improved surface
strength of paper.
Removing Paper Machine Bottlenecks with Targeted Rebuilds
Topics for Rebuilds of Headbox, Former and Press Sections -
Metso SHI Co., Ltd.
@Rebuilding an existing paper machine is often a very profitable
way for papermakers to increase the cash flow created by an older
paper machine. Metso Paper has placed particular emphasis in recent
years on developing concepts and products specifically for rebuild
needs. The outcome of this work can now be seen as a wide selection
of products offering quite possibly the best coverage of all time
of specific improvement targets. Different needs can be addressed
through truly different solutions. Selecting the best-fit alternatives
will offer great upgrade options for all paper machines and paper
@Metso Paperfs long experience with high-speed paper machines has
been put to good use to create more cost-effective small and mid-sized
solutions with the reliability and quality of bigger and faster
@In this paper, some of the most interesting and latest configurations
available today for rebuilds of wet part area, especially headbox,
former and press sections are discussed.
The Advanced Effluent Treatment System in Paper Mill
- Introduce of WSR Subsystem -
Takayuki Suzuki and Junichi Miura
Voith IHI Paper Technology Co., Ltd.
@To achieve an optimal process performance 3 key elements are vital:
First, the proper arrangement of water loops, Second, the removal
of ash and colloidal contaminants (e.g. micro stickies). Third,
an up-to-date reject handling system for effective preparation
of rejects and residuals for incineration (for landfill) in order
to meet the standard environmental interface for a modern plant.
We can provide you with specifically engineered integrated subsystem
for Water, Sludge and Reject-handling from a single source, customized
to meet your needs as an upgrade or for a new paper mill.
@In this time, we introduce Water, Sludge, and Reject system and
System of Wet-end Chemicals for Neutral Papermaking
Sales/Paper Chemicals, BASF Japan Ltd.
@Neutral papermaking tends to increase. Increase of pH involves
adverse affects such as drop of size degree, increment of foam
in white-water or increase of pitch problem. Therefore, existing
chemicals for acid papermaking must be reviewed to redesign optimized
system of wet-end chemicals for neutral papermaking.
@Innovative wet-end sizing agent gPMDh, originative retention / drainage system
and effective fixation system are introduced for neutral papermaking in this
Design of Internal and Surface Sizing Agent Corresponding to Various
Paper Chemicals Division, Arakawa Chemical Industries, Ltd.
@In the paper industry recent years, it advances toward the direction
where use of recycled paper increases from the resource conservation
and the rise of the concern to the environment.
@Recently, it is thought that a decrease in the quality of recycled
paper used for domestic consumption is advanced from the thing
that the recycled paper export ratio to foreign countries has risen.
@On the other hand, the amount of water used for papermaking is
also advanced to go more closed from the environmental burden and
the cost side. As a result, the development of the chemicals that
demonstrates an excellent effect for such a change is demanded
from the thing that is the environment that the chemicals for the
extraction paper of the rise of white water electric conductivity
and an increase of the number of anion impurities, etc. doesn't
demonstrate the effect easily.
@Surface sizing agent performance is controlled by the effect
of sizing of so on the internal sizing agent is understood, moreover,
it is pointed out to cause the problem (It bubbles, and dirt) in
operation etc. in the surface sizing though the effect corresponded
to the defect by increasing the amount of use.
@In this lecture, the influence of the effect on internal and
surface sizing agent and the design for sizing agent correspond
to these changes are described.
Development of Cationic Colloidal Silica Treated with Amino-functional
Silane for Ink Jet Paper
Mitsuru Ishii, Toshio Kakui, Masao Ishiguro and Sayaka Sato
Chemicals Research Laboratories, Lion Corporation
@Colloidal silica is well known as nano-particle, which is used
for the photo like paper for ink jet printing. Cationic colloidal
silica having positive Δ-potential was obtained by treating the
anionic colloidal silica with the amino-functional silane. By using
three types of colloidal silicas, anionic colloidal silica and
cationic colloidal silicas with the amino-functional silane and
aluminium oxide, the performance of them for ink jet paper was
investigated. In particular, the pigment inks did not run on the
paper coated with the cationic colloidal silica having the amino-functional
silane. It seems that the pigment ink having negative Δ-potential
strongly adsorbs on the cationic colloidal silica by electrostatic
A Study on Print Gloss of Double Coating
Yoshihiko Hattori, Hiroshi Nakamori and Noriko Kitamura
Latex Research Center NIPPON A&L
@@In our previous paper we found out the porosity of under coating
affected the formation of top coating and consequently had some
influence on the print quality of double coated paper. This time
further investigation was done to clarify the mechanism of print
gloss development and ink setting property of double coated paper.
@The behavior of ink vehicle was studied and it was found that
vehicle of the ink printed on double coated paper penetrated into
coating through top coating, i.e. the ink holdout of under coating
directly affected the ink setting property of double coated paper.
On the other hand the print gloss of double coated paper increased
with the smoothness of coating surface.
@Based on these results, optimal coating design of double coated
paper, which provides high print gloss and good ink setting property,
A Summary and Operation Experience of Biomass-boiler in Nakoso
Nippon Paper Industries Co., Ltd.
@The energy supply facilities of this factory were a heavy oil
boiler and diesel generation facilities conventionally. They depended
on fossil energy. From the viewpoint of reduction of an energy
cost and discharge hold-down of CO2, We planned switch to biomass
energy. We started driving of a biomass boiler in September, 2004.
For this factory, there was not the operation experience of a boiler
turbine set. Furthermore, we were inexperienced for a main boiler
of the factory which assumed a small piece of wood fuel. However,
we were able to operate facilities by cooperation of an operator
and a plant maker on schedule.
@Fuel of this biomass boiler is a small piece of wood and coal,
but now uses only a small piece of wood. In addition, an original
purpose is achieved by operation of a biomass boiler and now operates
it without a problem.
Reports on the 6th Pira International Sizing Conference and the
Chemical Engineering Laboratory of Complutense University of Madrid
Oji Paper Co., Ltd.
The University of Tokyo
@The 6th Pira International Sizing Conference was held on December
12-14, 2005, in Madrid, Spain. The conference had nineteen papers
concerning internal and surface sizing and about 100 participants.
Five presentations were from Universities, one was from partly
governmental institute, and others were from chemical and paper
industries. After the conference, the authors had a chance to visit
laboratories of Professors Blanco and Negro, Chemical Engineering,
Complutense University of Madrid. The outline of the Pira Conference
and the professorsf laboratories are then introduced in this paper.
Report of the International Chemical Congress of Pacific Basin
The University of Tokyo
@Pacifichem 2005 was held in Hawaii, USA from December 15 to
21, 2005 and more than 11000 scientists including 5600 from
Japan participated from Pan-pacific countries. Among 223 sessions
organized during the conference, at least 5 sessions were related
to the chemistry of biomass resources and plant organic polymers.
At the Session of gMaterials, Chemicals and Energy from Forest
Biomassh, 62 papers including 19 poster papers were presented.
Effect of Harvesting Time and Stem Height Position on Kenaf Bast
Pulp Yield, Viscosity and Fiber Length
Wiwin Suwinarti and Kazuhiko Sameshima
Kochi University, Faculty of Agriculture
@Kenaf variety Tainung-2 and Everglades-41 were planted in May
2003 and harvested at 80, 116 and 153 days after seeding. Kenaf
fiber was treated by sequence treatments of ammonium oxalate, sodium
hydroxide and acidic sodium chlorite (A) and acidic sodium chlorite,
ammonium oxalate and sodium hydroxide (B). The agronomic characteristics,
pulp yield, viscosity and fiber length were measured. The result
showed pulp yield, viscosity and fiber length was affected by harvesting
time. The pulp of 153 days after seeding gave much higher pulp
yield and viscosity but shorter fiber length than those of 80 and
116 days after seeding. The higher stem position has lower pulp
yield and viscosity but longer fiber length. This study also confirmed
that the method A is the best method for high viscosity bast pulp
production while the method B is the best method for fiber length
preservation and higher pulp yield.
Keywords: Kenaf bast fiber, harvesting time, stem height position,
pulp yield, viscosity, fiber length.
Elastic Stress Analysis for Case (Square Tubular Panel) of Corrugated
Fiber Board Box Shape under Uniform Compression at Center in
Upper and Lower Edges
Guest Professor, Research Center of District Corporation, Ehime
Professor Emeritus, Ehime University
@An elastic stress formulation was expressed for the square tubular case (CFBS:
anisotropic panel) of the corrugated fiber board box shape (width L, height h)
under uniform compression py0 at centers in upper and lower edges. Then from
this formulation the stress analysis is performed, and maximum values (xmax, ymax, xyma, 1min and 1max)
for normal stresses x andy to
width and height directions and shear stress xy,
principal stress 1 and
principal shear stress 1 were
obtained and characteristic behaviors for xmax, ymax, xymax, 1min and 1max were
@Rates of values andxy for
the anisotropic case to the isotropic are about xyEx/Ey and ymin/(ymin|xmin)
respectively. Ex and Ey are elongational
module in width and height directions and xy is
Poisson's ratio (strain effect for height direction normal strain to width direction
normal strain). Positions
of ymin and1min are
in the loading range of upper and lower edges and are independent of the case
shape change, and xymax and1max change
as be at positions of distance L/2 }’x from corners in upper and lower edges
with increases of L and the loading