|2011 April JAPAN TAPPI JOURNAL
Vol.65, No.4 Abstracts
Creation of “Super Eucalyptus” with the Molecular Breeding Technique
-Does the Molecular Breeding Technique Become One of the Last Resorts for Greening of Ruin Areas and Higher Biomass Production in Near Future?-
Forestry Research Institute, Oji Paper Co., Ltd.
Since 1991, Oji Paper has been advancing the overseas forest plantation business for securing the forest resource and to protect the environment. Paper quality is greatly affected by the fiber properties such as fiber length, cell wall thickness, cellulose and lignin content. To get comprehensive understanding the fiber development, we have developed the EST database and oligo-microarray system for the Eucalyptus genomics.
We already collected the gene expression profiles of three different Eucalyptus trees using our Eucalyptus oligo-microarray. To identify the expression trends of the genes involved in cellulose and lignin biosynthesis, we performed the trending data analysis using their expression profiles among several samples. Their trends could be divided into two groups, clearly. Finally, we identified the two gene clusters. Each cluster has several transcription factors (TFs). We already reported that EcHB1 (HD-Zip class II) and EcMYB1 (Werewolf-like MYB) can be used to improve growth and fiber properties by analyzing transgenic tobacco plants as model experiments in 2007 IUFRO Tree Biotechnology meeting at.
Currently, with the modified EcHB1 gene, we succeeded with creating “Super -Eucalyptus”. In this report, author show details of the latest results in own study.
Operational Experiences on New Waste Fuel Boilers
Hokkaido Mill-Shiraoi, Nippon Paper Industries Co., Ltd.
Hokkaido Mill-Shiraoi in Nippon Paper Industries is located in Shiraoi-cho, which is in the southern part of Hokkaido, and almost the same distance from Tomakomai city and from Muroran city; 30km from Tomakomai city, and 37km from Muroran city. Hokkaido Mill - Shiraoi has abundant water resources from the Shikiugawa River and has the capacity of 420,000 tons per year, which consists of three large-scale paper machines and one coater machine. It is one of our main mills for printing papers in Eastern Japan.
By 2010, Nippon Paper Group is working to reduce units of fossil energy by 20% compared to fiscal 1990 levels, and also reduce per unit CO2 emissions from fossil energy consumption by 16% compared to fiscal 1990 levels. To achieve our plan, we installed power generation plants running primarily on new energy such as biomass fuels in 11 mills from 2003 to 2009. Because Hokkaido Mill-Shiraoi had been reliant on heavy oil boilers and on inefficient Coal Stoker boilers, we installed a new boiler which was the eighth ones in our group in 2008.
In this paper, we will introduce main specifications of the new boiler, and operational experiences after start-up.
Operation Experience of New Energy Boiler
Nikko Mill, Oji Paperboard Co., Ltd.
Oji Paperboard Nikko mill is located nearby Kinugawa river which we can utilize its rich water and is close to metropolitan area. Making use of this good location, we have mainly produced liner, core board and so forth. We started operating a biomass boiler, aiming at the switch from crude oil to biomass fuel and decreasing carbon dioxide emission. I will report the experience of operating a biomass boiler after start-up, and the summary of an early trouble with operating.
Challenge for Energy Saving and Stable Operation by Innovative Technology in Stock Preparation
Akita Mill, Nippon Daishowa Paperboard Co., Ltd.
Our stock preparation system produces recycled pulp for liner board machine. After No.1 line was installed in 1981, we have reinforced it to 1991 while recycled pulp increased and increased production of liner board machine. Today, we produce about 80% of recycled pulp for liner board machine.
Our stock preparation system has three lines which are No.1 and No.2 line used 100% JOCC and No.3 line used JOCC and mixed waste paper. Then No.1 and No.2 line pulper was integrated in 2004 and this pulper was distributing recycled pulp to two lines of screen system.
In this time, we introduce an actual reference of saving energy, comparison of operation and present situation which we got by integration and simplification of existing system flow and innovating latest technology from pulping to screening for No.1 and No.2 line in May 2009.
The Variety Eco-wood Pulp Production by Batch Digester
Pulping Section, Sendai Mill, Chuetsu Pulp & Paper Co., Ltd.
Abandoned planted forest and bamboo forest erode other healthy forest, and affect eco-system at Satoyama (mountain village forest) nationwide. Proper thinning of such forest contributes the maintenance of Satoyama environment and the sustainability and reproductively of the biological diversity; in addition this contributes to prevent global warming.
Therefore the utilization of the forest waste resource such as thinning woods have to be accelerated, so producing paper products from the thinning woods is good solution for this purpose.
Sendai mill has been utilizing local thinning bamboo and cedar for years. We upgraded the batch digester system pulp line for small lot into ECF pulp production plant, and this upgraded line has started production recently and the local thinning bamboo and cedar wood are utilized more effectively.
We introduce an example this time because we started the variety eco-wood pulp production.
Operating Experience of Carrier Flow System for Effluent Treatment Facility
Kanto Mill Ichikawa，Hokuetsu Kishu Paper Co., Ltd.
Hokuetsu Kishu Paper Co., Ltd. Kanto mill consists of two divisions which are Ichikawa and Katsuta. Ichikawa division is located in the great Tokyo area and the main product is Coated White lined board that is mainly made up the used paper. In order to adapt the changing used paper quality and the increasing production capacity, the effluent treatment facilities have been improved several times.
Because of the facility aging problem, one of the microorganism treatment processes of the effluent treatment facility was currently replaced from Rotating Biological Contactors to Carrier Flow Systems. Until now, this new facility has been running well and providing great result.
In this paper, we introduce the outline of our new facility and the experience of the current operation.
The Laborsaving of the Finishing Process
Kishu Mill, Kishu Paper Co., Ltd.
In order to improve per-capita productivity of our Kishu Mill, each process was analyzed. Then, we found out low per capita productivity in finishing process and decided to streamline it. Before this streamline program, each production line had own finishing process, such as a cutter, a roll packing machine and a flat sheet packaging machine. During this program, these processes were consolidated and some of new systems were installed. After this consolidation process, another problem was expected. If all of paper making processes reach the maximum production rate, capacity of new finishing process is not enough to handle it. To overcome this problem, we installed temporary roll stock system for sheeting rolls as the buffer. In addition, automatic conveyance system has been installed entire this new process which is based on barcode identification system. As a result, per capita productivity had been significantly improved from 450t/person to 490t/person.
In this report, we introduce detail of our laborsaving process and current operation.
Development of Water Soluble Direct Thermal Paper
Nippon Paper Papylia Co., Ltd.
Akihito Ogino and Yasuaki Matsumori
Nippon Paper Industries Co., Ltd.
We introduce the market and feature about direct thermal paper having a function of water dispersion. This product consists of the water soluble paper that disperses to water quickly. Main usage is for direct thermal paper labels which have pressure sensitive adhesive on the back side.
At first, this label is printed by portable direct thermal printer with information of some letters or barcode and putted on objects. After using, the label is easily removed by water washing. It is special characteristic of this product.
For example, when the information should be expressed by label sticking on a surface of the returnable container, the information by human hand writing is unclear and occasionally other people can not read it. If all information is printed by direct thermal printer instead of human hand writing, these problems would be solved.
In addition, it brings an advantage, because it doesn’t need to peel off the label with the hand, if the label is quickly dissolved by the water.
Introduction of Vina Kraft Paper Co., Ltd.-Vietnam
Vina Kraft Paper Co., Ltd.
Vina Kraft Paper Co., Ltd. (hereinafter called VKPC) located near Ho Chi Minh City, Vietnam was incorporated in January 2007, and started building the largest containerboard mill in Vietnam. VKPC is a joint venture company between SCG Paper (Siam Cement Group), the biggest paper manufacturer in Thailand, and Rengo (Japan), and commenced commercial operation of the containerboard mill in April, 2009. Today, I would like to introduce VKPC as one of the examples of our joint ventures in a foreign country.
Report on the Results of the Follow-up Survey on JPA’s Committed Action Plan for Fiscal 2010 and Efforts against Global Warming in the Japanese Pulp and Paper Industry
Japan Paper Association
The Japan Paper Association (JPA) has been actively working to save energy since 1997 when it established its “Committed Action Plan on Environment”. JPA declares its policy of restraining CO2 emissions in the action plan, and is working toward the following targets revised in September 2007:
• On a five-year average basis from fiscal 2008 to fiscal 2012, reduce fossil energy consumption per unit and fossil energy derived CO2 emission per unit by 20% and 16% from the level of fiscal 1990, respectively
• By fiscal 2012, expand forest plantation area owned or managed by the industry at home and abroad to 700 thousand hectares.
Since fiscal year 1990, JPA has made a survey on the actual results of energy consumption in the year, published its results compared with that in fiscal year 1990. This report shows the results for fiscal year 2009, as well as energy consumption, CO2 emissions and the position of the pulp and paper industry in Japan, and information related to efforts against global warming such as carbon tax, emission trading, and total buyback program for renewable energy.
Strength Properties of Paper Pasted with Starch
-Role of Paper and Starch in Restoration of Paper Based Cultural Properties-
Takeo Kotake and Tatsuo Yamauchi
Graduate School of Agriculture, Kyoto University
Using an imitated washi paper made from wood pulp, a penetration of starch solution into a paper sheet and the locative variation in amount of starch applied by brushing were examined. As to the brush application with thin starch solution, the starch solution well penetrated inside the paper and a starch-paper complex structure, which was typically formed at the application method based on impregnation, was developed. In this case the tensile strength significantly increased with an increase of applied starch amount. On the other hand at the brush application with thick starch solution, the starch solution little penetrated inside a paper and a starch layer was eventually interposed by paper layers, which was typically formed at the application based on blade coating method. In this case the tensile strength little increased with an increase of starch amount. At the folding endurance the existence of a starch layer readily leaded to brittle failure although the starch solution penetrated well within a paper sheet. Thus, the applied amount of ca 33% at the application method based on impregnation and that of ca 25% at the brush application gave the maximum in folding endurance and more application of the starch rather caused a decrease in the folding endurance, irrespective of application method.
Keywords: brush application, pasting, restoration of cultural properties, starch, strength properties, washi papers