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Volume 13, Issue 6
Displaying 1-9 of 9 articles from this issue
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[in Japanese]1959 Volume 13 Issue 6 Pages 358-361
Published: June 10, 1959
Released on J-STAGE: November 18, 2009
JOURNAL FREE ACCESSDownload PDF (613K) -
[in Japanese]1959 Volume 13 Issue 6 Pages 362-366
Published: June 10, 1959
Released on J-STAGE: November 18, 2009
JOURNAL FREE ACCESSDownload PDF (717K) -
[in Japanese], [in Japanese]1959 Volume 13 Issue 6 Pages 367-370
Published: June 10, 1959
Released on J-STAGE: November 18, 2009
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Part 3. Changes in Lignin Structure during Water HydrolysisT. Matsugu, H. Shiraiwa1959 Volume 13 Issue 6 Pages 371-373,378
Published: June 10, 1959
Released on J-STAGE: November 18, 2009
JOURNAL FREE ACCESSChanges in the structure of softwood (red pine) and hardwood (pasania) lignin during water hydrolysis were investigated.
For softwood, the reactivity of lignin on sulfite cooking decreased almost linearly from the beginning of hydrolysis as the yield dropped, and also the reactivity on the initial reaction of sulfate cooking decreased. On the other hand, for hardwood, the former began to decrease at the yield of 85 percent, and the latter showed constant value during hydrolysis.
The amount of phenolic hydroxyl groups in hardwood lignin increased at the early periods of hydrolysis, but in softwood it showed constant value. These results were discussed.View full abstractDownload PDF (708K) -
Yukio Kojima, Masaru Sato1959 Volume 13 Issue 6 Pages 374-378
Published: June 10, 1959
Released on J-STAGE: November 18, 2009
JOURNAL FREE ACCESSThe conditions for water solubility test of wood were investigated to provide a new standard for ourselves, by which the results should reasonably agree with those by the TAPPI standard.
The results are as follows :
(1) Sawdust sample should be sifted out in comparatively narrow range, preferably 60 to 80 mesh.
(2) Hot water treatment should be carried out for 3 hours.
(3) The temperature for cold water solubility test does not so significantly affect to the results in the range of 20 to 30°C. Time for the treatment should be 48 hours.
(4) Glass filter IG-3 by “JIS” seems to be usable for both hot and cold water solubility tests.
(5) The constant weight can be reached by drying for about 4 hours at either “100 to 105°C” or “105±3°C”.View full abstractDownload PDF (889K) -
On the Qualities of Pulp ObtainedHayao Hosoi, Jun Takagi, Shuhei Gocho1959 Volume 13 Issue 6 Pages 379-384
Published: June 10, 1959
Released on J-STAGE: November 18, 2009
JOURNAL FREE ACCESSFor the purpose of examining the characteristic behaviors of new dissolving pulp manufactured by new method, several tests were carried out in comparing with Buckye's V5 and VX.
Results are as follows;
(1) The reactivity of this new pulp in emulsion xanthation is better than those of Buckye's V5 and VX.
(2) From the results of the solubility curve by NaOH and the distribution curve of lateral order, it is considered that this new pulp is very profitable for viscose manufacture.
(3) In the swelling test by 79 % H3PO4, this new pulp is already swollen in spiral type, but V5 and VX are not yet swollen in spiral type.
(4) The fractional dissolution curves of samples by ethyl acetate-ethyl alcohol mixture, indicate that this new pulp also seems to be very profitable for dissolving pulp.View full abstractDownload PDF (1381K) -
Emulsion (1st Report) Styrene-Indene resinRokuro Maernatsu, K. Ikawa, S. Tani, K. Ihara1959 Volume 13 Issue 6 Pages 385-390
Published: June 10, 1959
Released on J-STAGE: February 12, 2010
JOURNAL FREE ACCESSIn this paper we reported on the problem of petroleum resin emulsion sizing which was chiefly treated for the application in beater sizing. As the results of application in beater sizing it is obtained that the amount is 0.252% on pulp weight, as compared with rosin size showed slowly sizing effect, and increased paper stiffness.
The required amount of aluminum sulphate are sufficient 1%.View full abstractDownload PDF (1199K) -
On the Method to Draw Raw Tape out of Cut-MaterialsKuniichi Yamada1959 Volume 13 Issue 6 Pages 391-397
Published: June 10, 1959
Released on J-STAGE: November 18, 2009
JOURNAL FREE ACCESSThere are two ways of drawing out a raw tape ; one (C method) is to draw up a raw tape perpendi cularly out of the inside of cut-materia ls, and to twist thus already twisted tape in its same direction, and the second (D method) is to draw out a raw tape tangentially from the outer surface of cut-materials, and to twist a flat tape which is not previously twisted at all. In testing strength, elongation and evenness of yarns produced by the above two methods, it is made clear that in case of a thin raw paper of Japanese paper yarn or paper yarn, there is no difference between the two differently produced yarns, but in case of a thick raw paper the yarn produced in D method has bigger breaking elongation, though there is no difference in breaking strength between the two differently produced yarns, if they were not given moisture.
In C method the number of twist of tape when drawn up from the inside of cut-materials is different from that when drawn up from the the outer surface. Therefore in case that unevenness of twist number has serious effects on property of yarn, this C method can not be adopted. If unevenness of the twist number does not matter, any method of drawing a tape out of cut-materials can be adopted according to each twisting efficiency.View full abstractDownload PDF (992K) -
On the Effect of Ways of Rewinding Raw Tape from Large Package to Small Package on Strength of Raw Tape and YarnKuniichi Yamada1959 Volume 13 Issue 6 Pages 398-403
Published: June 10, 1959
Released on J-STAGE: November 18, 2009
JOURNAL FREE ACCESSGenerally speaking, in order to produce Japanese paper yarns and paper yarns raw papers are to be rewinded from large packages to small packages and cut into cut-materials which are to be twisted into yarns.
In the process of rewinding the number of turning of small package shaft is, at present stage, constant.And it goes without saying that the bigger the small package becomes, the faster the speed of outer-surface of the package becomes, and consequently in rewinding, raw papers are inclined to be tensioned. In other words, yarns twisted from outer surface of cut-materials are strong, while yarns from inner part of cut-materials are weak. Therefore, utilization of the winding process adopted by big textile industries at present is studied in this study. Especially the positive winding, which is considered to be possibly adopted without too much difficulties by small and medium enterprises, is studied.View full abstractDownload PDF (916K)
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