2006年9月 紙パ技協誌

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
 ・Constant ream feeding ensures the higher productivity per day comparing with man power

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.

 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