A Characteristic and Application
of the Hydrophobicity
(Non-pollution) Functional Plating for Paper Industry
Junji Taguchi, Tokumi Ikeda and Keiji Nakai
Nomura Plating Co., Ltd.
Yong-Bo Chong
Research Institute for Applied Science
Last time, at this society, we succeeded in development of a hydrophobicity
functional plating, announced that rough feature, and examined a
possibility that this plating could be used in the paper industry.
In this announcement, in order to examine a possibility that this
plating in the paper industry can be used, the environment which
can release and use the detailed data of this plating further was
reached, and possibility was examined.
LEIPA Schwedt PM 4
- LWC Production Line of the New Generation -
Osamu Fujimura
Voith IHI Paper Technology Co., Ltd.
Andreas Koehler and Falk Albrecht
Voith Paper GmbH & Co. KG
On July 30, 2004 the first LWC paper was wound on the Sirius reel
of PM4 at LEIPA Georg Leinfelder GmbH in Schwedt an der Ober, Germany.
PM4 produces 300,000 tons of high-quality LWC paper per year on
a wire width of 8.90 meters. Production can be based on up to 100%
recovered paper. To produce the highest product quality, Voith
bases the entire production process on the One Platform Concept.
The Feature of MJ-Sizer at Actual Coating Operation
Shigenari Horie, Masahiro Sugihara
Hiroshima R&D Center, Mitsubishi Heavy Industries, Ltd.
Hiroshi Miura and Toshiaki Miyakura
Paper & Printing Machinery Division, Mitsubishi Heavy Industries,
Ltd.
Film coater, such as gate roll and rod metering, is well accepted
as sizing and on-machine coating device by its compactness, runnability
and performance for production quality. Its low mechanical friction
stress, acts on base paper in the applicator roll nip, reduces
sheet breaks and then improves production efficiency. In addition
to above, either low fluid dynamic pressure acts on base sheet
in applicator roll nip region, and less penetration of coating
into base sheet at the film metering process realizes better surface
coverage of base sheet. Those features make the film coater as
a suitable device for light weight and ultra light weight coated
products.
MJ-Sizer, our state-of-the-art rod metering type film press, has several advantages
for stable operation, efficient production and easy maintenance. In this paper,
we present the features and advantages of MJ-Sizer those realize high efficiency
in light weight coated paper production.
Model-Based Predictive Adaptive Control of Pulp and Paper Mill
Processes
Jyunji Mizuki and Tamio Fukuzawa
Andriz K.K., Japan
Duncan Meade, Bill Gough and Sava Kovac
Ideas Simulation Inc., Andritz Group
This paper describes the application of a model based predictive
adaptive process controller (Brain Wave?) to a number of pulp
and paper mill control loops. These loops were maintained in either
open loop (manual) or PID control prior to the application of the
continuous controller due to their typically slow and varying process
dynamics, since these processes are very difficult to control.
All the Before application of the advanced controller, these loops
required used different traditional control strategies, such as
cascade schemes, varying model parameters or feedforward compensation.
Keywords: Model-Based Predictive Adaptive Control, Brain Wave,
Reel Brightness, Recausticizer
Conductivity, Slaker Temperature,
pH Control, Pulp and Paper Process Control
Application of SAQ® to Modified Cooking Processes (PartIII)
Junji Tanaka
Kawasaki Kasei Chemicals Ltd.
SAQ® has been used as a cooking additive in many KP mills.
This process is known as "Quinone Cooking". In order to apply
SAQ and
polysulfide (PS) to the recent modified cooking process, more effective
condition for SAQ has been investigated. The following results
have become clear with the small digester developed by KKC in which
addition and extraction of cooking liquors are possible during
cooking.
1) In this experiment, the synergistic effect of SAQ and PS in
the divided addition of liquors was almost the same as in the whole
addition (non-separating) of liquors.
2) The result was improved by changing from PS liquor to white
liquor, which was added in the middle of cooking (at the time
of cooking temperature being 130℃) .
3) As to the condition with SAQ and the model PS liquor in this
experiment, the PS concentration for acquiring the greatest effects
was estimated at approximately 6g/L.
Precise Fixed Quantity Injection System for Dyestuff
Keiichirou Oono
IWAKI Co., Ltd.
When injecting dyestuffs into a pulp, dyestuffs are blended with
pulp after the dyestuffs is taken from a dyestuff tank, which is
the mixture of dilution water and dyestuffs. However, this method
requires the management of the liquid volume and space for the
tank. Moreover, the saving of labor and space requires the in-line
system that allows dyestuffs to be injected directly to pulp-line.
But in case of using the feedback control by continuous flow pump
in the in-line type, which is shown in view 1, a large scale system
that equips the flow meters, control valves and controllers is
required. Therefore, there are some obstacle to obtain the great
labor and space saving. The pump must always transfer liquid quantitative
and precisely against pressure change in pipe-line.
To solve the problems above, it reports on the function and the
feature of the in-line injection system with the Hicera pump.
The Characteristics and Functional Mechanism of Retention Aid "Nano
Cluster Dispersion (ND) Polymer"
Yoshiya Yamaguchi and Takumi Ohara
Shonan Research Center, HYMO Corporation
The novel retention aid cationic polymer; Himoloc Nano Cluster
Dispersion (ND) polymer have been developed by water in salt-water
dispersion polymerization technology.
The aqueous solution of the polymer shows particle behaviors because
of its partial crystal or cluster structure in the molecule created
during the precipitation polymerization reaction.
The particle behaviors of the polymer result in swift dispersion
into the pulp slurries, small and strong flock with small stress-deviation
and homogeneous formation of the web.
The polymer will be applied especially for the neutral papermaking
and newsprint furnishes at the high-speed machines, where the pulp
slurries contain high ratio of fine recycle-fiber or calcium carbonate
filler.
The retention and performance and adaptability for the papermaking
process were discussed based on the unique behaviors of the polymer
solution.
Solutions for Papermaking Problems with New Spraying Chemicals
Part II
―A Study of Deposit Control Agents for Shower Application by Measuring
Zeta-Potential on
Flat Plates―
Yoshihiro Ando
Paper Chemicals Lab., Nichiyu Solution Inc.
Roles of deposit control agents are becoming more important for
quality improvements of paper and paperboard in recent years. The
advantage of deposit control agents for surface treatment is to
solve deposit problems efficiently by controlling deposits on surfaces
of pulp sheets with chemicals transferred from wire, felt, and
roll parts in wet-end sections of papermaking. The main functional
mechanism of "Spanol N-3250" is "Passivation" of wire and felt,
etc. Therefore, "Spanol N-3250" has excellent effects not only
on deposit control but also on drainage improvements in wet-end
sections.
This paper describes "Passivation" of deposit control agents for
shower application such as "Spanol N-3250" by measuring zeta-potential
on flat plates. As a result, we found that "Spanol N-3250" quickly
adsorbs onto hydrophobic plastic surfaces of the same materials
as machine clothing and forms the hydrophilic layer.
We also propose new solutions with "Spanol N-3253" to provide
improved performance in papermaking. "Spanol N-3253" combines the
above-mentioned
benefits of "Spanol N-3250" and excellent effects on dispersing
calcium carbonate that is one of the main components in complex
deposit. This means that "Spanol N-3253" is especially effective
as felt conditioner.
Material Retention - A New Concept for CMC
Teuvo Piilola
CP Kelco Oy
It is a well documented fact that poor water retention will not
only increase the solids content of the coating color, but will
also change other factors such as the particle size distribution
of pigments in the coating layer, the impact of which will become
evident. Carboxy Methyl Cellulose (CMC) due to its multi function
capability (water retention, rheology modification and the carrying
of optical brightening agents) has traditionally been one of the
most important coating components for the provision of good runnability.
In this paper we will more correctly discuss the concept of material
retention and its implications rather than confine it to the generic
term water retention. It is not only water which goes to the base
sheet during the coating process, all of the mobile material will
be affected as well, such as small pigment particles, latex, optical
brighteners and stearate. This is why we are discussing material
retention, which will have a huge impact on runnability and the
quality of coated paper produced. The need for more targeted material
retention systems will be summarized.
A New Raser Peak Consistency Transmitter
Bertil Olsson
Spectris Co., Ltd. BTG Division
This paper examines the importance of accurate and reliable consistency
measurement and control. It presents a completely new type of consistency
analyzer that opens possibilities for utilizing the knowledge of
process control technology for practical implementation, which
to date has been restricted by the imperfections of traditional
consistency analyzers.
Practical applications with improved calculations for screening
and stock preparation are presented and discussed.
Sumitomo Stripping System for Deodorization : Sumitomo/SFLOW®
- High Efficiency Type for 「Reduction of Steam Consumption」& 「Reduction
of COD」-
Koji Masuda
Sumiju Plant Engineering Co., Ltd.
We have been applying stripping technology to odorous wastewater
treatment, especially for condensate of digester and the drain
of evaporator at kraft pulping process. And Sumitomo have been
delivering both air stripping and steam stripping plants for long
times.
Now we have the know-how of the separation process (distillation,
absorption, stripping etc.) with high performance structured packing,
Sumitomo/SFLOW®.
On this paper, we introduce Sumitomo stripping system for deodorization
with latest delivery reference.
Development of Technology for Reproducing of Marine Environment
from Dredged Sediments by Using Paper Sludge Ash and Its Beneficial
Applications for Cleaning Ago Bay
Daizo Imai, Tadaya Kato and Ahmed Dabwan
Mie Industry and Enterprise Support Center,
Collaboration of Regional Entities for the Advancement Technological
Excellence
Isamu Harada
Nippon Paper Industries Co., Ltd., Environmental Dept.
Paper sludge (PS), which is mainly made from paper factories waste
can be utilized for useful applications. We developed the solidified
material by incinerating PS, and applied this technology for restoration
of the marine environment ecosystem.
The applicable areas can be summarized as follows;
1) Development of materials to be used as coagulant and hardeners.
2) Making micro-habitat pellets and marine blocks in order to
treat contaminated seawater and
polluted sediments.
3) Creating stable surface area for culturing seaweeds and seagrasses
(Amamo etc.).
4) Making artificial tidal flats. We believe these tidal flats
will contribute to enhance the stability
of the ground in areas
where the conditions are poor. It can provide also a vital habitat
for
different benthic species.
Automatic Folio Size Ream Feeding System
- Full Automatic -
Toshio Aoki
Maruishi Co., Ltd.
Maruishi introduces a revolution in paper industry, namely "Automatic
Ream Feed Robot". This system was developed by Schneider Engineering
in Switzerland and today, Maruishi manufactures the system under
the license agreement with Schneider Engineering. The characteristic
is as follows.
・Fully automatic working operation for ream feeding and size change
・Sheet is counted by optical special camera and correct number
of sheet per ream is
automatically fed into wrapping machine.
・No more tape inserter or ink mark for ream feeding and no more
maintenance for the both
devices
・Constant ream feeding ensures the higher productivity per day comparing with
man power
feeding
A Report on the 2006 Japan-China Pulp and Paper Technical Exchange
Symposium
Mitsuaki Otsuki*1, Soichi Saji*1, Toshihiko Koshino*2 and Kunitaka
Toyofuku*3
*1Oji paper Co., Ltd.
*2Hokuetsu Paper Co., Ltd.
*3JAPAN TAPPI
The first Japan-China technical exchange, "2006 Japan-China Pulp and Paper
Technical Exchange Symposium", sponsored and arranged by Japan TAPPI and China
TAPI, was held on May 23-24, 2006 in Beijing, China. The number of participants
of both countries was almost 200. After the symposium, Japanese participants
visited two mills.
Elastic Stress Analysis on Corrugated Fiberboard Container of a Box Shape
under Uniform Compressive Loading in Upper and Lower Edges (On Isotropic Side
Plates)
Satoru Matsushima
Guest Professor, Center for Corporative Research and Development,
Ehime University
Shigeo Matsushima
Professor Emeritus, Ehime University
An elastic formulation of bending deformation
for side plates of the case (width 350mm, height 300mm and thickness 5.44mm,
longitudinal coefficients 291N/mm2 and Poison's ratio 0.10) of
the corrugated fiberboard box shape made by applied uniform compression loading
of width direction strain zero in upper and lower edges was expressed by the
application to reasonable stress function combination. And from this formulation,
bending stresses were calculated and these characteristic behaviors were discussed.
Absolute maximum value of bending normal stress ( bxmax=-0.0652N/mm2)
in width direction is at plate centers and maximum values of bending normal stress
(bymax=0.262N/mm2)
in height direction, principal stress (=0.262N/mm2) and deflection
(=3.36mm) are at centers of side edges. And absolute maximum value of bending
shear stress
( bxymax=±0.163N/mm2)
and principal
shear stress (=±0.163N/mm2) are at plate corners. Ratios of
bending stresses and plane stresses (xmax, ymax, xymax)
are bxmax/xmax=6.6, bymax/ymax=2.6, bxymax/xymax=33.5
and those large ratio values are made of bending deformation easiness for the
shape of wide and thin
side planes.
Keywords: Computational Mechanics, Structure Analysis, Elastic Bending, Case
of Corrugated
Fiberboard, Elastic Stress Analysis, Structure Strength, Numerical
Analysis |
|