Dirt Check on Pulping Process
@ - Dirt Control by Measuring It with "Dirt Counter" -
OMRON Corporation IT Solution Div., Web Inspection Group
Dirt in the material of paper has been measured by checking dirt in the sample
sheet that is made only for checking dirt.
By this way, the feedback timing is very late and also, it is very troublesome
to make sample sheet, out of process.
Dirt Counter solved these problems by checking dirt directly in the slurry on
the process. It is quite effective and convenient equipment, not only for DIP,
but also for general KP.
The Development of the Polymer Rolls for Calender Machines
Atsuo Watanabe and Kenjiro Nakayama
We have been developing and selling polymer rolls for various calender machines
(SC, SNC and On machine multi- nip calendar) from 1987. We faced many problems
from start such as gheat spotsh, gcrack propagationsh, gabrasionh, gdelaminationsh
and so on. For the counter-measure we improved both of cover materials and the
adhesive strength, and decreased the inner stress of roll-covers fixed on steel
On this paper we report the outline of the improvement and itfs results.
Operating Experience of Acid Treatment and Ozone ECF Bleaching
Yatsushiro Mill, Nippon Paper Industries
Kraft pulp section of Yatsushiro mill consists of two fiber lines and both lines
were converted to ECF bleaching sequence in 2003. Medium consistency ozone bleaching
with an acid treatment (A stage) prior to ozone bleaching stage was introduced
to the fiber line #2 for hardwood. This A stage is the first commercial application
in Japan to prevent diffuser washer from scaling.
This report shows the mill experience of A stage and Ozone ECF bleaching.
Operating Experience of KURE 5 Paper Machine
KURE Mill, OJI Paper Co., Ltd.
No.5 Paper machine at KURE mill, OJI Paper, which has been started operation
as a fine paper machine in 1989, also now products LWC paper in response to the
market changes. This machine was designated as the gmodel machineh in our company
and we set up a project team to go about increase of productivity. As a practical
measure, for the purpose of reducing deposits and web breaks, several equipment
This article introduces the experience of operating these equipment.
Operating Experience of MJ Turn Bar
Keiichi Sato, Kunio Kazama and Shigeharu Yamahata
Hachinohe Mill, Mitsubishi Paper Mills Limited
@Since NO.7 PM (Paper Machine) of Hachinohe Mill, Mitsubishi Paper Mills Ltd.
began production in 1997, many kinds of paper products have been manufactured.
Especially, woodfree light weight coated paper has such a good quality that the
production of woodfree light weight coated paper is dramatically increasing.
While we tried to speed up NO.7 PM in order to increase the production, we got
a serious problem (release problem) which occurred at the release point of coated
paper from the SymsizerR application roll. The release problem caused the unevenness
of coated layer and prevented to increase the machine speed.
@@At last we decided to install gMJ Turn BarRh to NO.7 PM in order to improve
the problem.@Then it was already introduced on October 2003 and it's been working
well. gMJ Turn BarRh could make web releasing stability at the release point
from the application roll and enable us to increase the machine speed.
@@In this paper we report about our operating experience of gMJ Turn BarRh that
enabled us not only to keep the quality of woodfree light weight coated paper
but also to increase the productivity.
Influence of Molecular Orientation on the Curling Phenomenon in Laminated Films
@- A Curl Control Method of "Communication Paper" -
Advanced Technology Research Laboratory, Oji paper Co., Ltd.
Recently, plastic films have been widely applied to manufacture "communication
paper", such as direct thermal films (or paper) and dye diffusion thermal
transfer sheets. In these applications, the biaxially drawn films are used, and
their molecular chain orientation causes "curl phenomena", particularly
in laminated films.
We found that the curl-value (¢K) of plastic films clearly related to the difference
of the thermal expansion coefficients of each ply in laminated films, and the
thermal expansion coefficient could be predicted by measuring the degree of molecular
chain orientation (MOR-value) determined by the transmitted microwave intensity
Based on these findings, we propose that quantitative curl prediction is possible
by employing an approximate formula derived from the lamination theory.
Development and Future of Waterproof Laminated Paper gOperh
Komatushima mill, Nippon Paper Industries Co., Ltd.
gOperh, which is a waterproof laminated paper, has been made by Nippon Paper
Industries since 1988. gOperh maintains the same characteristics as general papers,
like gsoftnessh, gprintabilityh, gconvertibilityh. Now it is widely used in a
commercial printing business and in a converted paper business.
At the early stage of development, gOperh had some problems in quality, which
were caused by the effect of roughness and moisture of base paper onto the surface
morphology of laminate layers. We report here how we coped with these problems.
We also report the development of our new products, gThe Posterh, and gOper MDPh.
gThe Posterh, which is the product mainly used for posters, has improved ink
drying property which was the strongly required property by a market. And gOper
MDPh was developed for full-color laser beam printer, which is one of the on-demand
printing field which is remarkable growth field in recent years.
@@And we introduce our latest consideration to the environment.
Paper Pulp Raw Material Supply in the Future
@ - Research on Improvement of Production and Quality of Wood Biomass -
Forestry Research Institute, Oji Paper Co., Ltd.
The supply of raw materials is a business base of the paper manufacture industry.
It is necessary to aim at a production increase and a qualitative improvement
of the wood biomass by the expansion of the afforestation area in the stable
supply of the raw materials. Securing a suitable afforestation area will be expected
to become difficult by the competition with the farmland acquisition that originates
in the food problem. As a result, afforestation in a very bad environment with
various environmental stresses is not avoided.
Oji Paper succeeded in the creation of an environmental stress resistant eucalyptus
by using our original genetically modified technology. In addition, the genetic
information database of the eucalyptus was as also constructed for the improving
of the wood biomass. The wood formation mechanism of the eucalyptus is clarified,
and it will aim at practical use for efficient production of the wood biomasses
along with the stress tolerance in the future.
As a result, stable production of the wood biomasses becomes possible, and use
as the recyclable resource for the wood biomass not to mention the paper pulp
raw material to replace the fossil resource such as oil can be accelerated. In
addition, it is expected that large-scale afforestation of the eucalyptus that
has high carbon dioxide fixation ability becomes possible, and it contributes
to the carbon dioxide absorption for the global warming prevention greatly.
Operational Experience of Power Boiler for PS Incineration
Nippon Daishowa Paperboard Tohoku Co., LTD.
Since paper sludge (PS) generated in paper manufacturing has high water content
and low calorific value, its utilization as heat source is not popular. On the
other hand, waste tire is utilized partly only because reuse is restricted by
particular application due to difficulty in treatment of wire contained in tire.
Recently, treatment of waste tire becomes an issue of waste materials.
Incineration PS together with waste tire, but without auxiliary fuel (fossil
fuel) support, has been satisfied. The incineration boiler can produce high temperature
and high-pressure steam, and generate electric power of 14,000 kW in stable operation.
Thus it contributes to resource and energy conservations, reduction of wastes
and consequently utilization of wastes.
The incineration boiler was put in commercial operation since October 2003. Experience
and establishment of the plant operation with regard to reduction of dioxin emission
controlled by combustion temperature, turbine load control performed remarkably
in the waste incineration boiler and maintaining the plant in stable and safe
operation are described.
Operating Experiences of CL&K Removal System Using Ion-exchange Resin
@ - Chloride Ion & Potassium Ion Actual Operation Report of Removal System
for Solution of @@
Electrical Precipitator Ash at Recovery Boiler -
Niigata Mill, Hokuetsu Paper Mills, Ltd.
In the process of Kraft Chemical Recovery Cycle, Chloride (CL) and Potassium
(K) entering with raw-material wood chip are gradually accumulated and concentrated
during continuous operation. The plugging issue of carryover particles and dust
in the Recovery Boiler is caused by decreasing melting temperature of dust along
with increasing concentration of CL and K in the Black Liquor.
At the same time, fouling and corrosion at the super heater of Recovery Boiler
is apprehended. To avoid above problem, proper portion of recovered Electrical
Precipitator Ash was deserted from recovery cycle. In this manuscript, actual
operation data from CL&K Removal System using Ion-exchange Resin developed
and installed at Niigata Mill are introduced.
Operating Experience of RPF Boiler at Tomakomai Mill
Tomakomai Mill, Oji Paper Co., Ltd.
Tomakomai mill, Oji Paper Co.,Ltd., has contributed to the cultural and economical
development of Japan as the most important mill in Oji Paper since the establishment
Today, Tomakomai mill is the largest newsprint mill in the world and continues
to fulfill the obligation to provide stable supplies to the customers.
Oji Paper established the Environment Charter and is pledged to make further
efforts to reduce its consumption of fossil fuel by promoting thermal recycling
in which collected used paper and plastics which cannot be recycled are incinerated
In order to implement the plan, Oji Paper has installed a circulating fluidized
bed boiler (CFB) at Tomakomai mill. It is the first high temperature and pressure
boiler in the world, which uses RPF as the main fuel.
In this paper, the abstract of the RPF boiler is introduced and the operating
experience is reported.
The Advanced Information System for Paper Roll Handling
Kushiro Mill, Nippon Paper Industries Co., Ltd.
This paper describes the modifications incorporated in the information system
for the existing paper roll handling process. In order to share production, marketing
and inventory information between the headquarters and each domestic mill, the
paper roll tracking system was replaced in Kushiro Mill. Since the previous system
lacked memory, communication bandwidth and expansion capacity, new PC system
was introduced. It has successfully consolidated various products information
into single database. The next phase which is to expand this service to each
department by constructing company-wide LAN, has been introduced for two years,
and promotes the new system capability to the headquarters.