2002 Dec JAPAN TAPPI JOURNAL

 

JAPAN TAPPI JOURNALVol. 56, No. 12

December 2002 Abstracts


OptiLoad Calender-Multinip Calender-
Kei Iwanaga
Sumitomo Heavy Industries Techno-Fort Co., Ltd.

@The OptiLoad multinip calender has been in the forefront of the new surface treatment technology. Launched in 1996, the OptiLoad has become a synonym for the new generation multinip calender. The total number of all OptiLoad ordered is nearing forty, and the market, especially for on-line applications, has only just opened up. There are clear reasons behind this success. OptiLoad contains many innovative features, which have been specially developed to improve the efficiency and reliability of the new calender generation. Non-compromising design criteria and thorough pilot testing have contributed to predictable start up curves and the avoidance of surprises, for example polymer roll failure.
@On-line technology has been the focal point of the OptiLoad development from the very beginning. On-line technology has proceeded from newsprint and SC paper to coated woodcontaining grades and finally also to coated woodfree grades. In fact, on-line technology has now been applied to all major printing and writing paper grades.


Systematic Approach Janus MK2
Eiji Ando
Engineering Dept. Voith IHI Paper technology co., Ltd.

@The supercalender is the reigning device to produce high quality paper with a long tradition. Development of softcalender around 1980 represented a step forward, however, the softcalender likewise failed to meet all quality demands. In this respect the supercalender remained unchanged. In only five or six years, the Janus concept has in fact brought about a quantum leap in calender technology. This implementation has definitely derived from the new cover and material technology. This article introduce the new development via the systematic approach and how did it make up for the long stagnation in supercalender.


Modern Winder Improvement
Michio Takahashi
Jagenberg Co., Ltd., Voith Paper Group

@According to the demands from the market, paper mills are forced to produce better quality rewound rolls day by day, for which winder technology must be improved. Further, not only roll quality side but also size of shipping roll is becoming larger and larger due to printing reason.
@Under such a circumstance, Voith Paper Jagenberg GmbH improved single drum winder taking into consideration of the following important factors.
1) Rewound roll hardness control by center-winding. Individual rewound roll control ispossible.
2) Full automatic reel set changeIn order to reduce number of operator, full automatic reel set change is developed.
3) One man operation is possible.
4) During winding process, there is no influence on rewound roll quality by increasing rewound roll weight.
@According to the improvements, Vari-Plus can run with the most suitable tension for the applied paper and winding most suitable rewind torque for desired hardness. Therefore, we can expect less paper breakages and obtain exact required harness of roll.


WINROLL Winder| Winding concepts and WINROLL winder |
Hitoshi Takii
Sumitomo Heavy Industries Techno-Fort Co., Ltd.

@Increasing the size of rolls of rotogravure, LWC and newsprint, increasing the speed of printing press, and evolving of paper grades and paper making processes require to match the capacity of winder to the paper machine operated with high speed.
@Based on these demands, minimizing manual operating and increasing operation productivity, Metso developed the completely new multi-station winder called "WINROLL". There are many automated functions such as "splicing at unwinding stand", "web threading", "core handling" and "tail fastening", which make one-man operation possible.
@The WINROLL winder is able to produce 10 ton and 4 meter width rolls by new technologies.


Automatic Transfer System between Reel and Winder|Try for Automatic between Reel and Winder|
Makoto Inohara
Mitsubishi Heavy Industries, Ltd.

@Generally, after being made by paper machines and taken up by reels, jumbo rolls are taken out and transferred by cranes, and then supplied to winders. In empty spools after paper is wound by the winder is removed. Thereafter, the empty spool is returned to the reel by cranes. For the meanwhile, since the operation above requires manpower when using cranes, to eliminate such crane operation, automatic transfer systems and labor saving between reels and winders have been sought-after.
In order to achieve this automatization, we delivered the "Automatic Transfer System between Reel and Winder" to Nippon Paper Industries Co., Ltd. Yatsushiro Mill N-2 machine and Daishowa Paper manufacturing Co., Ltd. Yoshinaga Mill No. 14 machine, which realized unmanned transferring of jumbo rolls and spools between reels and winders, resulting in reduction of the transferring time and improvement of safety factor as the crane operation can be eliminated.
In order to meet the needs for speeding-up of the paper machines, we introduce double-winder arrangement to our Automatic Transfer System between Reel and Winder for jumbo rolls. Simultaneously, we are aiming to totally automatize the transferring system of jumbo rolls between reels and winders.


- SLITTING-The European way-
- Latest Development In Slitting Technology And Dust Reduction -
DIENES WERKE GmbH & Co. KG
PresidentFRudolf Supe-Dienes
ZVice President(Marketing Asia)FNorbert Lanzerath

@DIENES WERKE GmbH Co.& KG developed some new systems for web cutting.
We introduce their systems, for example, Dienes Digital Measuring System, "ASPS",Anti-dust-surface (ADS). Furthermore we introduce Dienesfs cutting theory for best quality of cut edge and less paper dust.


Current Situation of Fully Automatic Random Roll Wrapping Machine
Takeshi Ogasawara
Finishing Machine Sales Engineerring, Kawanoe Zoki Co., Ltd.

@The wrapping process, which is the final finishing process for rolls (products), must meet the needs of a larger wrapping volume and a larger variety of wrapping specifications than ever before. As production control in the entire plant becomes computerized, roll wrapping machines also receive wrapping data on-line, paving the way for automatic wrapping to process a large volume and a large variety of specifications. Now we have developed a roll wrapping machine that can process rolls produced by several paper machines, by increasing its wrapping capacity as well as enabling it to follow a large variety of wrapping specifications.
@This machine consists of a bar code reader, inkjet printer, wrapping machine, and labeler. Operation data for each part can be set or changed easily through a touch panel. The operator training will be completed in a relatively short time.
@This machine has demonstrated high reliability as equipment that plays an important role in the final finishing process for rolls.


OptimaNew Design Roll Wrapping System
Yasuhiko Shirokane
Engineering Dept. Maruishi Co.,Ltd

@With the increased speed and width of paper machines, larger paper rolls are produced for even faster printing machines. Corresponding to these requests, each machinery manufacturer is trying to develop high-quality, full automatic and labor-saving winders for bigger paper rolls with good quality. Thus, for more stable and efficient production, the recent trend of the finishing line is one unified wrapping system optional with the diversity of wrapping forms for various paper rolls from several winders.
@As a result, Maruishi-Saimatec newly-developed wrapping system, capacity over 150 rolls/hr. with only one operator, has become a realized dream to paper mills around the world. This super productivity is achieved on account of on-line synthetic FA control, a robot system, innovated index conveyors and so on.
@We would like to introduce such new technologies jointly developed by Maruishi in alliance with Saimatec. In order to provide equipments that meet the various needs of paper mills around the world, our technologies and innovations will go on.
@In this article, Ifd like to explain in details the rationalization concept and optimum features of "Optima-Multi roll Wrapping System", particularly about the "Robot Lap System", which is highly evaluated around the world.


Logistic Information System for Pulp and Paper Industry
Junichi Ryuuzaki
Information Solution Business Division, Yokogawa Electric Corporation

@The information processing business on the pulp and paper industry is dramatically changing for recent few years. This remarkable progress comes user request and vender proposal by using the latest IT technology with rapid development.
@Thus, the purpose of logistic control system on the pulp and paper mill has changed from labor saving and partly-process optimization to all-process or all-mill optimization. Therefore, the engineer required more rich experiences and extensive knowledge such as computer, process, plural vender control, etc. than before.
@In this article is presenting the most effectiveness logistic information system by using our recent delivery experience.


Operating Experience of Janus Calender to Yonago N-1 Coater Machine
Akira Chikazawa
Yonago Mill, Oji Paper Co.,Ltd.

@m|1 Coater at Yonago mill, Oji Paper, has been in operation since September 1997. The Coater has two coating stations of 7,290mm coating width, and the design coating speed is 1,600m/min, producing mainly 700tpd of woodfree coated paper.
@Janus Calender from Voith Paper, Germany was installed following the coating section as an on-line supercalender for the first time in the world. The primary objective of having on-line supercalender at the coater was to reduce the initial investment and maintenance costs, to achieve higher personnel productivity, and to produce coated paper of better quality. This article introduces the latest operating experience of N-1 coater and Janus Calender.


A Report on 17th ISO/TC6 Meeting
Takayuki Okayama*, Tadashi Kano** and Tetsuhisa Oishi
Pulp and Paper Testing Committee, JAPAN TAPPI
*Tokyo University of Agriculture and Technology
**Nippon Paper Industries Co., Ltd.

@ISO/TC6 held a meeting on June 10-14 in Paris. Two Sub Committees and thirteen Working Groups also met during the week of the ISO/TC6 meetings. Seventy-five delegates representing seventeen countries attended the meeting of TC6.
@A new work item for the measurement of fibre coarseness will be carried out within TC6/SC5/WG18, which was renamed "Fibre properties". TC6/SC2/WG29 "Thickness, density and specific volume" was reconstituted for the revision of ISO 534. WG30 "Tensile properties" and WG31 "Edge quality of cut-size office paper" were also established within TC6/SC2.
@TC6/SC2/WG25 is in progress of formalizing the appointment of Messmer and Lorentzen & Wettre as Standardizing Laboratories for the calibration of print-surf dummy heads according the requirements in ISO 4094.
@At the plenary meeting of ISO/TC6, it was announced that the next meeting would be held in Tokyo from November 3-8, 2003.


HBS pulping (4)- ECF Bleaching of HBS pulp and Thermo-stabilization of HBS Solvents-
Aorigele, Junko Kajimoto and Yoshihiro Sano
Laboratory of Wood Chemistry, Graduate School of Agriculture, Hokkaido University,

@Todomatsu (Abies sachalinensis Mast.) chips as softwood gaveT-pulp with a Klason lignin (KL) content of 5.6% and a viscosity degree of 21.5 cP at a yield of 50.3% by HBS pulping with a mixture of 70% aqueous R-1,3- and 1,4-butanediol (as RHBS shown in Fig. 1) at 210 for 3 h. Birch (Betula platpylla var. japonica Hara) chips were cooked with 80% RHBS at 180 for 3 h to give B-pulp with a KL content of 5.0% and a viscosity degree of 43.4 cP at a yield of 54.3%. Chinese reed gave R-pulp with KL and ash contents of 2.5 and 6.3% in a yield of 48.7%, when cooked with 80% RHBS at 200 for 2 h. B- and R- pulps were fully bleached by ECF sequence with OD, and T-pulp with ODEPP. Bleached B- and T-pulps had TI of 12.4 and 17.6 mNEm2/g, indicating that TI of HBS pulp was remarkably improved by ECF bleaching. Seventy and 80% aqueous HBS such as 1,3- and 1,4-butanediol, propylene glycol and 1,5-pentanediol were quantitatively recovered on heating at 190 for 2 h, so they can be reused repeatedly as pulping solvents without distillation for purification and also with a little loss.

Keywords: HBS pulping, high boiling solvent, wood, reed, ECF bleaching,save-energy pulping process


Elastic Deformation Analysis for Case (Square Tube) of Corrugated Fiberboard Box Shape under Uniform Compression
Satoru Matsushima
Guest Professor, Center for Corporative Research and Development, Ehime University
Shigeo Matsushima
Professor Emeritus, Ehime University

@A formulation of elastic deformation was expressed for side plates in the case (width L/height h=1/2~2) of the corrugated fiberboard box shape (CFBS) supported by upper and lower edges under uniform compression loading. Then from this formulation, behaviors for stress and strain were discussed.
@Normal stresses Ђ, Ђ and strains  , in width and height directions for the plate are symmetric to center lines of the width and the height, and shear stress т is anti-symmetric. And  is mainly plus and  is minus, and the maximum of  is in upper and lower edges and the maximum of EÂE is at distance L/7 from the upper or the lower edge in side edges. The maximum value of  is about 10 to the maximum value of EÂDThe maximum of EЂE is constant to increases of L and h, and the maximum of EЂE increases a small with L increase and decreases a small with h increaseDThe maximum of EтE decreases obviously with L increase and increases obviously with h increaseD The maximum of  first increases a small and next decreases obviously with L increase, and first increases obviously and next decreases obviously with h increase. The change of the maximum of EÂE is a small to changes of L and hD

Key WordsFComputational Mechanics, Structure Analysis, Elastic Bending, Strength of Corrugated Fiberboard Box, Elastic Stress Analysis, Structure Strength, Numerical Analysis