2004年8月 紙パ技協誌

 

JAPAN TAPPI JOURNALVol. 58, No.8

August 2004    Abstracts


The Latest ID-Screen & FiberNet with ID-Technologies― Intermediate Deflocculation & Dilution Device for Simplification and Power Saving of Screening Process ―
Kazumi Fujita
Aikawa Iron Works Co., Ltd.

 ID-Screen is the latest screen equipped with ID-Technologies (Intermediate Deflocculation & Dilution Device) which breaks the flock of fibers & small flakes and dilutes the reject stock consistency for recovering 100% passage efficiency of screen basket. With ID-device, the 2nd or the 3rd processing became possible in the one set of ID-Screen. FiberNet is the latest reject treating screen which also applied the ID-Device. ID-Screen & FiberNet realize dramatic simplification and power saving of screening process.


SiriusTM: High Performance Reeling Concept
Eiji Ando
Application Engineering Dept. Voith IHI Paper Technology Co., Ltd.

 To fulfill the wide varieties and precise requirements of paper industries, future paper machine concept needs comprehensive and flexible solution considering the context process. Voith Paper offers “One platform concept” to cover the all customer requirements. This concept contains the special components for each section as well as total platform for the processing. For reeling component, SiriusTM covers needs of advanced reeling requirements for all paper and board grade. This characteristic issue is the one nip control via the Senso-reel drum. The nip load is continuously applied without changing the loading system. SiriusTM winding system allows maximum variability in the selection and application of all winding parameters. This description shows our new reeling concept for the most modern paper machine.


The Application of Novel High Cationic Charge Density Dispersion Polymers for Paper Chemicals
Yoshiya Yamaguchi
Paper Chemical Group, Shonan Research Center, HYMO Corporation

 We have developed novel cationic dispersion polymers obtained by graft polymerization of acrylamide and (meth) acrylate onto polyalkylene polyamine. Specific properties of these polymers are not only high cationic charge density such as polyalkylene polyamine on the present market and also wider molecular weight distribution, higher polymer concentration, lower product viscosity and higher solubility.
 The monomer components and polymerization processes have been carefully designed and optimized for various applications of wet-end. As a result, several line-up products have been prepared; Himoloc MT series as pitch control agents, Himoloc FR series as drainage aid and Himoloc SR series as retention aid respectively. These products are expected to help paper mills achieve stable paper making proceeding by controlling pitches and anion trashes, and increase paper making productivity by higher retention and draining rate in the wire section, by higher squeezing rate in the press section and by higher drying efficiency in the dryer section.


Improvement of Blade Former Performance with VentaShoeTM Technology― Upgrade Path to Next Generation Blade Former: MH-Former iFB ―
Keiichi Fujiki
Mitsubishi Heavy Industries, LTD., Paper & Printing Machinery Division
Hiroshi Iwata and Kazuhiko Masuda
Mitsubishi Heavy Industries, LTD., Hiroshima R&D Division

 Mitsubishi Heavy Industries, LTD. has developed a new technology that combines the best aspects of roll-blade and pure blade forming. This new technology consists of replacing the initial forming zone with a grooved smaller radius blade design. Rework to a former and headbox is minimal.
 As in roll forming, the VentaShoeTM traps the jet more symmetrically with a positive angle to the wires that reduces the jet impingement sensitivity. Reduction in jet impingement sensitivity provides easy operation without any defects such as light spots. The blade drainage section provides the superior formation of a traditional blade former.
 There are currently three papermachines utilizing this new technology. The first started up in North America in 2001 then the second and third started up in China and Japan respectively in 2002. All have been demonstrating many benefits in terms of paper qualities and papermachine operation.


A Study on Pigment Coated Paper Produced by High Speed Curtain Coating (2)
Kazuaki Ito, Hisashi Matsui and Atsushi Higuchi
Polymer Research Laboratories, JSR Corporation

 Curtain coating is the non-contact coating method which liquid sheet falls freely onto the substrate to be coated. This coating system is very simple and has many advantages in easiness of operation, production efficiency and so on. In addition of these, recent works have been reported that curtain coating provides a very good coverage against coated surface expectively. In spite of the many advantages, curtain coating has not been used for the pigment coating because of the various problems occurred under the high speed condition.
 In this paper, we report the influence of roughness character of the base paper surface and coating color properties on the above problems. We also report the character of high speed curtain coated paper surface and these printing properties compared with blade coated commercial A2 or A3 grades.


A Study of Sheet Gloss Part 2
Noriko Kitamura
Latex Research Center, Nippon A&L INC.

 The tendency to improve the quality of coated paper becomes more and more marked in these years. In connection with this, the demand of increasing sheet gloss of coated paper is also rising. In our previous paper, we studied the relation between sheet gloss and surface roughness of coated paper and found that sheet gloss was highly affected by surface roughness. The higher the smoothness of coated surface, the higher the sheet gloss.
 In this paper, we focus on the effect of volume change of coating color and constriction of base paper during drying process on surface roughness. To study the properties of coating color and the constrictions of base substance, coating colors are prepared changing in total solids, pigments and water retention agents and are coated on base paper and polyester film.
 The result shows that sheet gloss of coated paper depends strongly on volume change of coating color during drying process ; the smaller the volume change of coating color during drying process, the higher the sheet gloss of coated paper. This tendency is same in case of coating on base paper and coating on polyester film. Namely, the coating color, the volume change of which is small during drying process, gives high sheet gloss to the coated paper and such influence is superior to that of the constrictions of base paper.


Application of SAQR to Modified Cooking Processes
Junji Tanaka
Kawasaki Kasei Chemicals Ltd.

 SAQR has been used as a cooking additive in many KP mills. This process is known as "Quinone Cooking". This paper shows how SAQ is applied to recent modified cooking processes. In order to make conditions of laboratory test similar to the ones of a real digester, we developed a small scale digester in which addition and extraction of cooking liquors are possible.
 Using this equipment, the following results became clear.
1) Addition of SAQ at the top of digester is most effective. The effect of SAQ is decreased if it is added after the start of cooking. Also divided addition of SAQ is not efficient.
2) When SAQ is added to the top of digester, the divided addition of white liquor doesn't influence the effect of SAQ.
3) The amount of extracted SAQ from a digester accompanying the extraction of black liquor is very small. Even if some of SAQ is extracted with black liquor from a digester, the effect of SAQ is scarcely influenced.


Fundamental Knowledge of Adhesion Phenomena and Application
Seiya Okamoto, Munetaka Mukasa and Isao Yoshimura
Tesatape k.k.

 Adhesive tape products are common in consumer and industrial use. And they are used massively in Paper Manufacturing Industry. But we found the customers who don’t know always the properties of adhesive products, then they encounter difficulties when choosing tape-products or solving their problems.
 In this session I’ll give explanations about the following features based on the view point of designing adhesive-tapes for Paper Manufacturing Industry.
1) Fundamental knowledge of adhesion phenomena.
2) Application knowledge for actual use.
3) Practical example of adhesive tapes for each paper manufacturing process.
4) Introduction of tesa new tape product “EasySplice Winderline”.


Improving Runnability of Papermaking Machine through Optimization of Wet-end Operation Part II
Masa Taniguchi, Koichi Tadaki, Munetoshi Yamaji, Shigeru Kurose and Kenji Tsunekawa
Chemicals for Pulp & Paper Div., Technical Dept., Somar Corporation

 Diversification of recycle fiber sources and concern on environmental issues in paper industry in recent years makes papermaking operation more troublesome. Common use of Alum in acid papermaking has been reduced due to the trend in neutral conversion and scale deposition. Further improvement in wet-end operation and cost reduction are the subject of total machine operation. In particular use and effectiveness of various wet-end chemicals are under consideration.
 Deterioration of raw material quality influences both machine runnability and paper quality. It is difficult to achieve required objectives by a simple chemical application. It is common that one quality improvement may cause other properties to suffer. Due to complexity of the problem, the system using multiple chemicals rather than single chemical gives more realistic solution.
 The presentation last year entitled “Optimization of Wet-end Operation by Realizer” demonstrated problem solving approach from the analysis of machine deposit resulting from biological, inorganic and organic materials. Somar’s long history on biocide application, and wet-end improvement by effectively capturing pitch and anionic trash, and observing scale deposition and foam formation, allows new proposal ; total deposit control system.


Improved Process Control with STFI On-line Fiber― On-line and Laboratory Measurements of Fiber Quality Based on Image Analysis ―
Hakan karlsson
Product Manager, Lorentzen and Wettre AB

 L & W STFI Fibermaster is a platform for pulp quality measurements. Measured values are fibre length, width, shape, kink, fines, coarseness, bendability, vessels, shives and freeness. The latter are recent developed extensions with complementary technology developed to suit different applications. The base is fibre analysis with cameras and image analysis. The development of measurement technology was carried out originally at the Swedish Pulp and Paper Research Institute (STFI). Many R&D laboratories in Scandinavia use L&W STFI Fibermaster. Several on-line applications have now been implemented. The leading market pulp producer in Europe has on-line measurement of fibre properties installed on all of the Scandinavian mills.


Introduction of ITALIAN Waste Water Treatment into JAPAN
Akira Yamaguchi and Yasuyuki Murata
Industrial Machinery Div., HEIWA PAPER CO., LTD.

 HEIWA PAPER CO., LTD. started the new business at April, 2002, such the introduction of the treatment of industrial and municipal waters, sludge and rejects, from Italian
 O.M.C. Collareda Srl into Japan.
The main operating processes introduced at the present time, are three systems such as FLOATION, SETTLING-FLOATATION, FILTRATION. Each system has a special designedequipment, as follows,
1)FLOATATION system...DELTAFLOAT and TIGERFLOAT.
2)SETTLING- FLOATATION system...SEDIDELTAFLOAT.
3) FILTRATION system...GAMMAFILTER, OMEGAFILTER, DENSIDESC and SIGMA-FILTER.
are explained the structures and mechanics in detail in this paper.
The application sectors in this paper focus on the spcific and final treatments for paper board mill waste water.


The 2004 Pan Pacific Conference― April 19〜10, 2004 at Canberra, Australia ―
Gyousuke Meshisuka*1,Toshiharu Enomae*1,Kawamura Ayano*2, Kazuhiro Kurosu*3,
Keiko Fujita*3 and Kunitaka Toyofuku*4
*1The University of Tokyo
*2Oji Paper Co., Ltd.
*3Nippon Paper Industries Co., Ltd.
*4Japan Technical Association of the Pulp and Paper Industry
  2004 Pan Pacific Conference incorporated the 2004 Appita (18-22 April) was held in Canberra, Australia. Mr. Meshitsuka, professor at Tokyo University and Mr. Toyofuku, executive director of Japan TAPPI attended the conference as the representatives of Japan TAPPI. At the conference 4 Japanese speakers noted
The representative from Paptac (Canada), Japan TAPPI, Korea TAPPI, TAPPI (Philippines), Taiwan TAPPI were in the attendance at the conference, but the representative from TAPPI (USA) was not.


Kraft Pulping Characteristics of Plantation-grown Acacia Mangium
Keigo Watanabe
Nippon Paper Industries CO., LTD., Pulp and Paper Research Laboratory
Takanori Miyanishi
Nippon Paper Industries CO., LTD., Fushiki Mill

 The first large-scale afforestation of Acacia mangium was started in 1991 at Provinces of South Sumatra, Indonesia. Prior to the construction of a new pulp mill, kraft pulping characteristics of plantation-grown Acacia mangium was investigated in our laboratory. It was found that pulp yield was very high and was comparable to Eucalyptus globulus. Acacia mangium pulp had high brightness, low dirt and high viscosity. It was a short and thin-walled fiber, and was valuable for its ability to produce paper with low bulk, high opacity and good smoothness. In 1999 the Musi Mill in Indonesia was constructed and is currently producing full bleached kraft pulp at a rate of 450,000 tons per year. Major applications are woodfree printing paper, lightweight coated paper, tissue paper, and white board.

Keywords: Acacia mangium, kraft pulping, afforestation