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Volume 35, Issue 5
Displaying 1-8 of 8 articles from this issue
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Masaru Katagiri1981 Volume 35 Issue 5 Pages 399-402
Published: May 01, 1981
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSIndustrial archeology, like archeology in general, depends largely upon material evidence or so called “industrial monument” in its approach. Historical studies on industries and their technology may hardly be successful without industrial monuments.
Japan Industrial Archeology Society, established in 1977, has proposed a nation-wide survey of industrial monuments of various industries.
The Japanese pulp and paper industry, except the traditional hand-made papermaking, started in 1870 s by introducing western technology, and has made a remarkable progress and expansion. But at the same time a great number of valuable industrial monuments might have been lost.
Taking a few typical books of the history of Japanese pulp and paper industry as a reference, and also some papers regarding the economic and technical history of the industry, the author emphasizes that the industrial monuments are inevitably essential for these works. As a conclusion, it is recommended that the above mentioned survey and preparation of the list of these industrial monuments should urgently be carried out by those who are working in the field.View full abstractDownload PDF (525K) -
Eiichi Masaki1981 Volume 35 Issue 5 Pages 403-411
Published: May 01, 1981
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSOne of the fundamental and characteristic properties of paper is the complex porous structure, which is extended not only in its bulk phase but also on its surface. Paper quality thus depends very closely to the property of porous structure. It is true also that the porous structure is an important factor in all aspect of printability of paper.
In this paper, the various phenomena occuring in printing process and print quality are reviewed in terms of porous structure of paper, focusing onto ink transfer, ink penetration and drying, printing smoothness, print gross, print image quality from the known theories and measuring methods.View full abstractDownload PDF (1164K) -
Kawanoe Mill, Taio Paper Mf g. Co., Ltd.Tabu Paper Mfg. Co. Ltd.1981 Volume 35 Issue 5 Pages 412-416
Published: May 01, 1981
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSKawanoe Mill was established in April, 1956. It initiated the manufacture of Kraft linerboard (brand name “KS liner”), the first produced from Kraft pulp and Semi-chemical pulp in JAPAN.
The pulp needed for this mill is wholly supplied from Mishima Mill, located in only one kilometer distance from Kawanoe Mill. The Kawanoe Mill has produced several kinds of paper. Such as Unglazed kraft paper, Heavy duty Sack kraft paper, Extensible paper, Semi-Bleached kraft paper, Coloured woody paper and woody paper.View full abstractDownload PDF (11771K) -
Hiroji Shibazaki, Setsuji Edagawa, Hisashi Hasegawa1981 Volume 35 Issue 5 Pages 417-426
Published: May 01, 1981
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSA method for manufacturing a new precipitated calcium carbonate pigment and its application to paper coatings are described.
In the conventional batch systems, it was difficult to obtain the calcium carbonate well-controlled in particle size, especially in the range of 0.11.0 μm.
The new precipitated calcium carbonate prepared continuously by stepwise carbonation process consists of cubic crystals, the particle size of which is freely controlled in the range of 0.11.0 μm and which contain little aggregated particles.
Data showing physical, chemical, theological, optical, and paper coating properties are presented.
It can be pointed out that this new pigment improves the gloss of coated paper to a great extent without altering the other desirable properties of calcium cabonate, although it is commonlyaccePted that the calcium cabonate pigments lower the gloss of coated paper.View full abstractDownload PDF (6735K) -
Behavior of Kraft Lignin in Activated Sludge TreatmentKazuhiko Sameshima, Norio Takamura1981 Volume 35 Issue 5 Pages 427-433
Published: May 01, 1981
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSActivated sludge treatment of diluted kraft black liquors (CODMn 2, 0002, 500ppm) prepared in laboratory from red pine (Pinus densiflora) and white birch (Betula platyphylla) was examined through a half liter batch process. The behavior of organic components in the black liquors were examined by fractionations and lignin isolation from both the treated and untreated black liquors. Results were as follows :
(1) The removal of BOD5 was 9597%, while that of CODMn was 2630%. Absorbances at 280 nm and 400 nm increased slightly in avarage. The pH value after the activated sluge treatment increased from 7 to about 8.5.
(2) The fractionation experiments indicated the removal of hydroxy acids which are the main contributors to BOD5 and other low molecular components which are difficult to be oxidized by KMnO4.
(3) The isolated kraft lignin from treated black liquor showed an increase of molecular weight and a large increase of absorbance in both ultra violet and visible light regions through the activated sludge treatment. The absorbance increase of the whole treated black liquor, however, was not reflected by the large absorbance increase of isolated lignin, which indicates the existence of both color removing and color forming ability of activated sludge organisms.
(4) Alum treatment of diluted black liquor is recommended to be performed prior to activated sluge treatment because of high alum dosage requirement and the color increase of lignin fraction.View full abstractDownload PDF (821K) -
Michihiro Fujii, Akira Tsuchida1981 Volume 35 Issue 5 Pages 434-436
Published: May 01, 1981
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSA new method which enabled tetrabrombisphenol A (TBPA, a fire retardant) as a wet-end additive was discovered. When the alkali solution of TBPA was mixed with pulp slurry, and then the mixture was acidified with alum, fine feather-like crystals of TBPA were deposited on the pulp fibers. The paper formed from them showed high retention of TBPA and had an excellent flame resistance property. Use of antimony trioxide along with TBPA increased further flame retarding effect. The electric resistance and the insulation breaking voltage of the paper were high enough for flame resistance electric insulating paper.View full abstractDownload PDF (300K) -
I. Shimizu, T. Komatsu, E. Inoue1981 Volume 35 Issue 5 Pages 437-442
Published: May 01, 1981
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESS -
1981 Volume 35 Issue 5 Pages 443
Published: May 01, 1981
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSDownload PDF (129K)
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