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Volume 14, Issue 4
Displaying 1-9 of 9 articles from this issue
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[in Japanese]1960 Volume 14 Issue 4 Pages 212-217
Published: April 10, 1960
Released on J-STAGE: February 10, 2010
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[in Japanese]1960 Volume 14 Issue 4 Pages 218-220
Published: April 10, 1960
Released on J-STAGE: November 17, 2009
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Hiroshi Kurata, Hiroshi Iizuka1960 Volume 14 Issue 4 Pages 221-224
Published: April 10, 1960
Released on J-STAGE: February 10, 2010
JOURNAL FREE ACCESSA laboratory procedure for the realistic screening of paper mill toxicants is described.
This method is modified for the pulp substrate method that was already proposed by Appling et al in 1951. The technique consists of two parts, that is ;
The technique I is using 1% of pulp solution for the test culture substrate, and Pseudomonas melogenes, Penicillium steckii, Aspergillus niger and Humicola grisea are inoculated on it for the test organisms.The technique II is employed as slime sample which was taken directly from an area of the mill system in stead of the test organisms. The dilution plate method is made for an evaluation of biosides mixing substrates in which slime forming organisms had been growing.
This technique is available for the selection of slime control agents at the laboratory of paper mills.View full abstractDownload PDF (927K) -
Isao Takano, Yasumasa Yonezawa1960 Volume 14 Issue 4 Pages 225-232
Published: April 10, 1960
Released on J-STAGE: February 10, 2010
JOURNAL FREE ACCESSIn the determination of lignin content and chlorine number of high-yield pulps, the reproducibility of results and correlation between those each two values were studied.
Pulps used were made from two soft woods and two hard woods by neutral sulphite semichemical process, and ranged in lignin content from 5 to 24 %.
Lignin was determined according to TAPPI Standard T 222 m-54, and chlorine number was determined by four methods, e. g. Roe's (TAPPI Standard T 202m-45), the modified Tillage's Ueno's and the improved method, deviced by authors combining above two.
Results obtained were summarized as follows :
1. The correlation between lignin content and Ueno's method was good linear relationship through out all woods.
2. In the case of the modified Tingle method and the improved method, the correlation between lignin content and those one differed from species, namely soft wood and hard wood.
3. Those linear functions, showing the correlation, were consisted of two parts having a refraction point at 14 % lignin content.
4. The coefficient of lignin content to chlorine number increased with lignin content, but differed from methods, excluding Ueno's one, and species.
5. It was found that the correlations among chlorine numbers were better than the correlation between lignin content and chlorine number.
6. The correlations that authors have found between lignin content and each chlorine number, were differ from relations which had been reported by many researchers.
These were probably due to differences in lignin content, pulping method, wood species used and other unknown factors.
7. From the stand point of the reproducibility of results, it could not experimentally evaluate that which method was best one.
8. In preparing of the dried pulp samples, light at determination and drying temperature. room one to 105°C., have not been found to exert a marked influence on the determination of the Roe chlorine number.View full abstractDownload PDF (3365K) -
(Part 3) Effects of Heating on Mechanical Strength under Dry ConditionYuichiro Take, Yutaka Suzuki, Isamu Obigane, Hiroshi Nagai1960 Volume 14 Issue 4 Pages 233-240
Published: April 10, 1960
Released on J-STAGE: November 17, 2009
JOURNAL FREE ACCESSMechanical behavior of the paper for power cable under dry condition was studied. The samples w ere impregnated with insulating-oil or microcrystaline wax after drying, and tensile strength, elongation, folding endurance, bursting strength and tear resistance were measured.
(1) Comparing the mechanical strength under dry condition with that RH 65 %, there was remarkable change in the elongation of C. D (cross direction) and the folding endurance of both directions, C. D and the M. D (machine direction). Especially, the folding endurance of M. D showed the decreases of about 98%.
(2) The order of properties which had been effected by heating was as follows;
folding endurance>bursting strength>tear strength>elongation>tensile strength.
(3) Comparing the heating in the air with that in the vacuum, so much difference was not approved by heating of 110°C and 130°C in all the properties, but remarkable change was recognized at 150°C.
(4) Some difference was shown on the extreme decrease both direction, M. D and C. D by heating and remarkable difference was shown in the folding endurance and elongation by heating in the air.View full abstractDownload PDF (1391K) -
1960 Volume 14 Issue 4 Pages 240
Published: 1960
Released on J-STAGE: February 10, 2010
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On the Action on Pitch Trouble of the pH and Temperatue of, and of the Inorganic Ions occurring in the Water usedK. Nishida, K. Kuroki, T. Ono1960 Volume 14 Issue 4 Pages 241-246
Published: April 10, 1960
Released on J-STAGE: February 10, 2010
JOURNAL FREE ACCESSPitch trouble varies in magnitude according to the pH and temperature of, and to the inorganic ions present in, the water in which the pulp is in suspension. A study on this problem led to this conclusion :
1) The water in use must be kept very low in pH-acidified if possible-and at 50°C, if the pitch trouble is to be minimized. The trouble begins to increase when the water is at oraround 20°C and to decrease when it is 40°C∼50°C, but such a high temperature renders the operation inflasible in a factory.
2) Of the inorganic substances occurring in ions in the water, Cu, Ca, Mg and Fe aggravate the trouble in no small measure and Na is negligible.
3) The water, when it contains Ca and Cu in ions, must be acidified at pH 6 or less it is to be safely used.
4) A mineral acid or an organic acid is preferable to Al2 (SO4) 3 as an agent to beused for adjustment of the pH of the water, becuase Al2 (SO4) 3 used for the purpose in its originate state enhances the trouble by its own action as an acid.View full abstractDownload PDF (1241K) -
[in Japanese]1960 Volume 14 Issue 4 Pages 247-256
Published: April 10, 1960
Released on J-STAGE: November 17, 2009
JOURNAL FREE ACCESSKOMATSU-FINER is the conical type refiner newly developed and designed based on both Gap-loadrelation theory and helical path theory by Komatsu Mfg. Co., Ltd. The pulp refined by this KOMATSUFINER is guaranteed its extremely high stable quality due to less whirling roter and unique activityof recirculation system of this machine. Four types of KOMATSU FINER, 15PS Test Finer, 75PS, 150PS and 500PS have the roter and the shell made of cast steel or lava-stone. Among the four typesof KOMATSU FINER, 500PS type refiner, the first and the biggest in the world asthe conical typerefiner is now being used for mass production of LUKP-Liner at the Kushiro Plant of Honshu PaperAlla, . Co., Ltd.
Performance : 500PS Type
LUKP-Liner, Capacity 300T/D
40, 000MEH, 3.3PS/T/D/100 cc Freeness drop
150PS Type
LBKP-C102 Bleached
20, 000MEH 2.3PS/T/D/100 cc Freeness dropView full abstractDownload PDF (1782K) -
[in Japanese]1960 Volume 14 Issue 4 Pages 257-260
Published: April 10, 1960
Released on J-STAGE: November 17, 2009
JOURNAL FREE ACCESSDownload PDF (490K)
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