Application Engineering Dept. Voith IHI Paper Technology Co., Ltd.
The product demands antithetic requirements: better surface quality
and less loosing of its bulk. The shoe nip calendaring is one of
convincing answer to the old question how a paper web can be calendered
without loosing too much of its bulk. The NipcoFlex calendar, as
the new shoe calendar called at Voith Paper, has been released
and being carried out energetically to explore its capability.
This calender mainly acts via the extended nip and associated longer
This description shows very brief overview of the huge collection
of the trials, experience of 1st commercial product, and to demonstrate
the potential for the NipcoFlex calendar.
Newspaper Mill Optimization of Flotation Cell
Bo-Johan Ljungqvist and Chiaki Benitani
Spectris Co., Ltd., BTG Division
These presentations show what BTG can do in de-inking plants
especially regarding “Optimization of flotation cell”.
A de-inking plant consists of a combination of different stage, which essentially
serve to separate unwanted material from the recovered paper and to enhance the
quality of the fiber suspension. The number and nature of the stages in the process
are determined by the fiber suspension requirements. These requirements come
from the paper grade that will be produced and this will also determine the raw
There is always a pulping stage designed to disintegrate the recovered paper.
During this stage, with the help of the right chemicals, the printing ink can
be detached from the fibers. After the pulper, various screening and cleaning
stage follow. At these stage impurities such as bits of metal, glass, sand and
adhesive impurities (“stickies”) are removed. The next step in the process is
the flotation, where the actual de-inking is done. Finally we have the bleaching
stages to boost the level of brightness and dispersion stages to further break
down the printing inks in the fibers and to pulverize impurities that cannot
be seen by the naked eye. There are also other sub-systems for treating rejects
Operating Experience of Dirt Counter
Kushiro Mill, Oji Paper Co., Ltd.
In Kushiro mill we are using the 7 sets of dirt counter. These equipment
are helpful to find the abnormal condition at the process and we
could reduce the number of sample checking by operators. I will report
that the process of the installation and operation for the first
one at DIP plant, and the operating experience at DIP and BKP plant.
Condition Monitoring Marketing Service Division, SKF Japan
SKF offers a full range of products and services to assist customers
in achieving maximum bearing and machinery service life, and
is committed to providing optimum solutions for Trouble-Free
Operation™ of plant machinery.
A Kvaerner Pulping Way to Improve the Environmental Operation
of a Fiberline by Small Means
R&D, Kvaerner Pulping AB
Projects Department, Kvaerner Pulping KK
When the environmental operation of a pulp mill is assessed
much of the attention is usually paid to the bleach plant. This
appropriate. The development of bleaching technology has been
very rapid over the past 25 years and more is to come. In order
to keep up with the frontrunners of environmentally friendly
bleaching continuous investments in the mill are required.
The aim of this article is to give an overview of recent trends and to point
out ways to improve the environmental operation of an old bleach plant having
a limited budget.
Maintenance Management of a Drainage and Supply Pipe Way Institution
-Spiral Jet Washing of a Superannuated Drainage Pipe, a Hose Lining
Method of Construction, etc.-
Toshiya Mochizuki and Satoru Ura
Toyobo Engineering Co., Ltd., Environment Solution Division
There are many superannuated drainage and supply pipes, especially
things on which carbonic acid calcium and oxalic acid calcium deposited
the drainage pipe way of a papermill firmly, and the washing is serious.
Spiral (using the water amount of 180 l/min by super-high pressure,
and moving a jet nozzle spirally/wash efficiently and) A jet method
of construction is introduced.
Medicine washing of unnecessary neutralization processing is also
united and proposed in the diameter of a small sum.
Reproduction of a pipeline introduces a hose lining method of construction
applicable from the diameter of a small sum to the diameter of a
large quantity. A hose lining method of construction is without excavating,
and is a method of construction from a manhole which carries out
reversal insertion the seal hose which has tough and waterproofness
into a pipe by air pressure. The seal hose is made to harden 2 liquid
reaction type hardenability resin uniformly applied in, and forms
a new pipe in the inside of a pipe.
Introduction of Various Rolls for Sheet Conveyance
Oji Engineering Co., Ltd., Kanzaki Branch
The field which coats water or oil solvent onto a film and metal
foil, etc., is required high precision coating in order to reduce
the variation of coat weight in comparison with the field coat
onto a paper.
The products with which especially the variation of coat weight appears as a
result as it is, for example, a photosensitive film, a film for medical treatments
and surface treatment of metal foil, need high precision coating.
The high precision coating needs the high performance coating head, the stability
of a sheet thickness and the accurate cross tension, but these demands are not
The torque of an unwinder part and the drive system of a winder part ordinarily
set up sheet tension in a coating machine. Also it is known widely that rotation
resistance of the non-driving rolls that are installed in order to convey a sheet
has a great influence upon a sheet tension.
The outline of several sorts of rolls that should cope with these problems is
New Evolution of PAM Type Paper Strength Agents
Research and Development Department, Paper Chemicals Division
Arakawa Chemical Industries, Ltd.
In recent circumstances of paper making industry, conventional
polyacrylamide (PAM) type paper strength agents are tend to difficult
to exhibit their inherent characteristics because of the change
in operating conditions.
This report shows our developed new PAM paper strength agents having sharp molecular
weight distribution, which prepared by a new polymerization method, and their
characteristics. This report further shows 2-liquid-combination system wherein
two kinds of the new PAM agents having different flocculation characteristics
The above combination system has an object to keep well balance of freeness
formation by unifying the size of pulp flock, thereby improving paper strength
Each of the single liquid system and the 2-liquid-combination system shown in
this report can be suitably selected in conformity with paper manufacturing purpose.
Therefore, our proposed systems can provide superior results than those of conventional
systems, in relation to flocking property, paper strength efficiency and formation.
The Latest Information of Polyvinylamine
- Fixing Agent Based on Polyvinylamine -
BASF Japan Ltd.
SEIKO PMC CORP.
Hydrophobic substances like wood pitch, white pitch and stickys
are introduced into the paper machine circuit by the raw materials
To minimise runnability problems related to these substances, treatment
with cationic fixing agents is common.
An entire class of new polymers, the polyvinylamines, has been developed.
These new polymers have a large potential to improve the treatment
of hydrophobic substances. The bonding strength between fibres and
particles and therefore the fixing performance of polyvinyamines
can be controlled by a wide choice of molecular weights, cationic
charge densities and hydrophobic functional groups.
The effectiveness of polyvinylamine based fixing agents having different
charge densities and different degrees of hydrophobicity, is demonstrated
by the results generated in different lab studies and mill trials.
Ciba® TELIOFORM® SYSTEM
- A NEW MULTI COMPONENT ORGANIC/INORGANIC SYSTEM -
Joe Ledda, Philip A Ford, Ryuta Miyazaki and Masashi Hasegawa
Business Line Paper, Water and Paper Treatment Segment, Ciba Specialty
Chemicals Co., Ltd.
Microparticle and micropolymer retention and drainage aid systems
are powerful tools for paper and board making on a wide variety
of machines. Deficiencies attributed to current systems can include
apparent high cost, production and quality problems, and negative
effect on formation, or in other words, the negative effective on
printing qualities of the final sheet.
The next generation of multi-component organic/inorganic systems
has demonstrated their ability to improve formation for the same
retention level, or increased retention, with either no negative
effect on formation, or in some instances, even improved formation!
They offer the ability to dial in retention/drainage/formation with
the same high return on investment of current microparticle systems.
Modern Technology for In-line Measurements in P & P Industry
- Conductivity, Dissolved Oxygen, Turbidity and Oxidation-Reduction
Mettler Toledo K.K., Ingold Group
At the last Annual Meeting in Hiroshima, we introduced the modern
technology for pH measurement in Pulp & Paper Industry. However,
there are other important parameters, not only pH, but also Conductivity,
Dissolved Oxygen, Turbidity and ORP. These parameters are available
for in-line measurements in P&P Industry. So we would like
to introduce some examples of application regarding these parameters.
Pest Control in Pulp and Paper Industry
- Pest Control Activities for Quality Assurance -
Research and Development, Earth Environmental Service Co.
There are 5 important activities for inset pest control (prevention
of insect contamination) in terms of quality assurance in pulp
and paper factories as follows;
1) Analysis of claim from customers caused by contamination
of insects as well as detection of contamination in the factory.
It is important that they should identify the kinds of insects
(=contaminants), date and time of contamination, and contaminated
location of processing line. Results should also be recorded,
collected and kept.
2) Investigation of successive data of each kind of contaminants
captured by traps in the factory. It is important that they
should summarize the profiles of each contaminants in the documented
form i.e., insect pest library.
3) Establishment of integrated preventive procedures by correlation
study of cause and process of contamination by insects. Information
about ecology and behavior of each contaminants is convenient
to decision of effective procedures.
4) Collecting environmental parameters indicating strength
of light, direction and velocity of air flow, temperature,
humidity for all monitoring points as well as the number of
5) Periodical audit and validation of activities. It is important
that they should refine and correct activities by periodical
education and training of employees.
Repulpable Tape for Paper Mill
- Repulpablity of Tapes -
SUMITOMO 3M Limited
Repulpable tapes are used for many applications at paper mills.
The most important property of these tapes must be “repulpability”.
Repulpability is unique requirement for these applications.
It is not easy to give repulpability to pressure sensitive
adhesives because many other requirements for these tapes
(such as shear resistance, heat resistance and anti-bleeding)
become trade-off to repulpability. So we have to harmonize
repulpablity with other properties in developing repulpable
In this presentation, I will show requirements for repulpable tapes, the relations
between “repulpability” and other properties and a test method of “repulpability”.