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Volume 41, Issue 1
Displaying 1-17 of 17 articles from this issue
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Nobutoshi Omodaka1987 Volume 41 Issue 1 Pages 1-2
Published: January 01, 1987
Released on J-STAGE: October 27, 2010
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...1987 Volume 41 Issue 1 Pages 5-8
Published: January 01, 1987
Released on J-STAGE: October 27, 2010
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Nobutoshi Omodaka1987 Volume 41 Issue 1 Pages 9-18
Published: January 01, 1987
Released on J-STAGE: October 27, 2010
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Kiyoaki Iida, Minoru Kimura1987 Volume 41 Issue 1 Pages 21-22
Published: January 01, 1987
Released on J-STAGE: October 27, 2010
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...1987 Volume 41 Issue 1 Pages 23-25
Published: January 01, 1987
Released on J-STAGE: October 27, 2010
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Shinichiro Noda1987 Volume 41 Issue 1 Pages 27-32
Published: January 01, 1987
Released on J-STAGE: October 27, 2010
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Tadashi Koike, Hideki Hariguchi, Jun Furuya, Tsutomu Sasaki1987 Volume 41 Issue 1 Pages 33-41
Published: January 01, 1987
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSHigh brightness as well as as low dirt level are required for the deinked pulp for printing paper. The good bleachability and ink-removal efficiency from fibers are essential for manufacturing the deinked pulp with high brightness.
This paper deals with two important processes, i.e., the detachment of ink from fibers and the removal of ink particles suspending in the pulp slurry. The emphasis is on the mechanism and the technique of the detachment of ink from fibers.View full abstractDownload PDF (1784K) -
Junji Ohsawa1987 Volume 41 Issue 1 Pages 42-47
Published: January 01, 1987
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSReduction of vessel picking tendency of hardwood pulps can be achieved by (1) reducing vessel content in a stock, (2) reducing the size of vessel elements, and (3) increasing vessel-tofiber bonding strength. Even though printing papers were made from the same beaten pulp, the vessel picking tendency changes considerably, depending on the paper machine, paper making conditions, and printing apparatus.
The most fundamental way to prevent vessel picking troubles is to eliminate large vessel elements from the surface of printing paper.
The first and the simplest way is the selection of suitable hardwood chip species which have small and slender vessel elements and conformable fibers. The second way is the removal of large and square-shaped vessel elements from hardwood pulps using hydrocyclones. The third and possibly the best way is the covering of vessel elements in paper surface with fibers using, for example, stratified sheet formation techniques.View full abstractDownload PDF (850K) -
Norihiko Shimokoshi1987 Volume 41 Issue 1 Pages 48-52
Published: January 01, 1987
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSSym-Former R has been installed on existing fourdrinier of PM3 printing paper machine at Niigata Mill Hokuetsu Paper Mills, Ltd.
It has been running successfully after start up in March 1985.
This twin-wire machine was also new to Hekuetsu. We would like here to introduce some of our experiences with the Sym-Former R.View full abstractDownload PDF (1505K) -
Takashige Yoshimura, Hiroshi Hara, Takayuki Okayama, Raysabro Oye1987 Volume 41 Issue 1 Pages 53-58
Published: January 01, 1987
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSPaper properties, such as formation and wire marks, are influenced by the initial drainage and water removal on a paper machine wire. Then, drainage behaviour was studied from the view point of dynamic wettability and water removal by fabrics. The former is related to water penetration into fabric, and the latter is to extraction of water from the fabric.
Plastic single layer fabrics (103 and 86 mesh), a plastic double layer fabric (180 mesh), a bronze wire (90 mesh) and a triple layer fabric were examined.
Contact angles of a water drop after reaching a fabric surfaces were measured in every 10ms. In case of dry fabrics contact angles were proportional to the fabric mesh number.
When fabrics were wetted, little differences in the contact angle was found between mesh numbers, but contact angles of the plastic multi layer and bronze decreased more rapidly than the plastic single layer. In a dry fabric, it was related to physical characteristics of wire filaments.
The drainage volume was determined by means of centrifugal force. The fabric of a small mesh number had a more drainage volume. The magnitude of drainage volume were in the order of triple layer, double layer and single layer. Bronze wire which was more wettable showed bigger drainage volume compared to plastics. Higher water retention in fabrics, larger pore size and higher wettability of fabrics showed a tendencies to better water removal.View full abstractDownload PDF (2250K) -
Toshio Oka1987 Volume 41 Issue 1 Pages 59-63
Published: January 01, 1987
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSCD profile control systems are usefull for improvement on the quality of paper sheet. By the middle of 1986, CD profile systems had been installed about 80 systems in Japan. This paper presents some experience with basis weight and caliper CD profile control.View full abstractDownload PDF (823K) -
Shingo Mori1987 Volume 41 Issue 1 Pages 64-67
Published: January 01, 1987
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSOn the conversion of Nakagawa Mill No.7 Paper Machine from acid system to alkaline system, new white water recycling system was introduced.
Operational results of this new system are reported.
Nakagawa Mill No.7 Paper Machine produces papers with ash content ranged 10-30%.
New white water recycling system is composed of sedimentation and filtration, as primary and secondary treatment.
Introduction of new white water recycling system resulted;
(1) reduction of specific water consumption from 80m3/t to 34m3/t,
(2) reduction of mill effluent turbidity from 40ppm to 10ppm,
(3) reduction of recycle system path volume-reduction of pulp loss and time loss accompanied with composition change and machine shut down,
(4) reduction of ash content fluctuation.View full abstractDownload PDF (479K) -
Haruo Tsukamoto, Michihiro Nakura1987 Volume 41 Issue 1 Pages 68-73
Published: January 01, 1987
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSPilot plant test and its supplementary test have now been done as the last step of research and development of Direct Causticizing Technology to get the data for technological and economical estimation. The experiments are to be finished in March, 1987.
This article deals with the characteristics of ferric oxide as the causticizing agent, which are- the particle size and pelletization, mixing with black liquor, makeup ratio, purity and the reactivity of ferric oxide, and their influence on the construction of chemicals recovery system by Direct Causticizing Technology. An example of its total process is illustrated.View full abstractDownload PDF (969K) -
Seiya Hirai1987 Volume 41 Issue 1 Pages 74-77
Published: January 01, 1987
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSACTICONTACT is a kind of contact aeration process.
60000m3/d plant was constructed for KP wastewater treatment in Sendai mill and good result had been obtained since June 1985.View full abstractDownload PDF (802K) -
Kenkichi Yoshinaga1987 Volume 41 Issue 1 Pages 78-80
Published: January 01, 1987
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSOut line of our cut-sized sheet lines is introduced and operational experience and quality assuarance of our cut-sized sheets are explained.View full abstractDownload PDF (497K) -
Tsutomu Naito1987 Volume 41 Issue 1 Pages 81-85
Published: January 01, 1987
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSA paper laboratory automation system was completed using the distributed computer system, which has been working satisfactorily. The system consists of fourteen Testream Interface Units (TIUs) which is connected to each test instrument and a minicomputer.
Data from these TIUs are collected and calculated by the minicomputer which has the function of the database management. Report formats with Japanese characters, and graphics were developed by Jujo Paper Company, and these data are sent to the head office and the six mills all over Japan. The advantage of the system in comparison with the conventionally manual system before the installation of the system are as follows;
1. The testing productivity increased at least 30 percent because of decreases in test time, steps in workflow and manhours.
2. The testing reliability increased by elimination of recording, rewriting and hand calculation.
3. The laboratory services were improved by the immediate availability of the complete report, and the graphical outputs at the laboratory client's site.View full abstractDownload PDF (2295K) -
1987 Volume 41 Issue 1 Pages 86
Published: January 01, 1987
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSDownload PDF (205K)
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