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Volume 15, Issue 10
Displaying 1-9 of 9 articles from this issue
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[in Japanese]1961 Volume 15 Issue 10 Pages 642-647
Published: October 10, 1961
Released on J-STAGE: November 17, 2009
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[in Japanese]1961 Volume 15 Issue 10 Pages 648-651
Published: October 10, 1961
Released on J-STAGE: November 17, 2009
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Viscosity of Fattyamineligninsulfonates in Organic SolventYoshikazu Kojima, Akira Hayashi, Isamu Tachi1961 Volume 15 Issue 10 Pages 652-656
Published: October 10, 1961
Released on J-STAGE: November 17, 2009
JOURNAL FREE ACCESSFattyamineligninsulfonate was dissolved in organic solvent with dissociation. However, dissociation of ligninsulfonate was only a little and suppressed with addition of 0.1 mol fattyaminehydrochloride. Viscosity of ligninsulfonate in methanol containing 0.1 mol fattyaminehydrochloride was measured and the relation of [η] =KM0.13 was obtained. If ligninsulfonate was dissolved in pure methanol, viscosity of this solution accorded to Fuoss' equation for polyelectrolite and [η] =KM0.54 was obtained.
From these viscosity measurement and fractionation data in previous report, it is suggested that solubility of fattyamineligninsulfonate in organic solvent is mainly depend upon the solvation of alkyl group of amines, and that molecule of lignin is hardly solvated with organic solvent and coiled to pretty compact sphere.View full abstractDownload PDF (957K) -
Yoshio Tsutsui1961 Volume 15 Issue 10 Pages 657-661,667
Published: October 10, 1961
Released on J-STAGE: November 17, 2009
JOURNAL FREE ACCESSAlthough many literatures have been presented about the identification of dirts in paper, we can't see any reports or reviews refering to their major types in DSP.
In this report the methods of physical and chemical classification of dirts; respectively resin, bark, bast fiber, shives, wood particles, gum, iron and iron rust, copper, slime, sand, scale, glass, asbestos, coal, oil and grease, felt fair ; were studied and several photomicrographs were shown.
The greater parts of dirts in commercial DSP were shives and bark, besides them gum, slime, etc. were observed.View full abstractDownload PDF (11967K) -
Hisaaki Toda, Tsuneaki Kijima1961 Volume 15 Issue 10 Pages 662-667
Published: October 10, 1961
Released on J-STAGE: February 10, 2010
JOURNAL FREE ACCESSHemicelluloses were extracted from birch or fir woods (holocelluloses) and their various bleached pulps, and the relation between the crystallinity and the adhesive property was investigated.
The hemicellulose isolated from sulfite pulp, which is inferior in adhesive property, is higher in crystallinity than that from wood or sulfate pulp (Fig. 1 and 2), probably owing to the lower degree of polymerization (Table 1 and 2).
The hemicellulose isolated from sulfate pulp increases in erstallinity as the degree of polymerization clecreases by cooking with sulfite liquor (Fig. 3 and Table 3) and then decreases greatly in the adhesive property (Fig. 4).
The hemicellulose of neutral sulfite semichemical pulp, which is superior in adhesive property, is as lower in crystallinity as that of sulfate pulp (Fig. 5).
It is well-known that the adhesives considerably higher in crystallinity is inferior in adhesive property.These results suggest also the relation between the strength of fiber-to-fiber bond in pulp sheet and the crystallinity of the hemicellulose.View full abstractDownload PDF (942K) -
Setsuzo Ohta1961 Volume 15 Issue 10 Pages 668-673
Published: October 10, 1961
Released on J-STAGE: November 17, 2009
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Water-Containing Ratio of Japanese PaperH. Kato1961 Volume 15 Issue 10 Pages 674-676
Published: October 10, 1961
Released on J-STAGE: November 17, 2009
JOURNAL FREE ACCESSMoisture of paper can be classified as follows
(1) To be loaded moieculary in the interior of fibres.
(2) To be adhered to inside the capillaries through the apertures in the minute structures of fibres.
(3) To be kept in isolated condition inside and between the fibres.
Moisture dehydrated by the common method is the isolated ones, and adhesive moisture is hard to be dehydrated.
Moisture-ratio's differences of Japanese paper depend upon the following itemes :
(1) Difference to thickness.
(2) Proportion of timber-pulp mixtured.
(3) Whether bleached or unbleached.
(4) Existence of filling-drug, size etc.
Generally the thin paper has a larger moisture-ratio than the thicker
When Kozo-paper is compared with timber-pulp mixed paper, the former has a smiler free water content.
Also, paper mixed with bamboo-fibres such as Gasenshi has a larger moisture-ratio.
In case hether bleached or unbleached, the former has a larger moisture-ratio.
Paper added with a sort of clay as a filling-drug has a large moisture-ratio.
And the paper with a large solid-fraction in general has a large moisture-ratio, too.View full abstractDownload PDF (792K) -
[in Japanese]1961 Volume 15 Issue 10 Pages 677-678
Published: October 10, 1961
Released on J-STAGE: November 17, 2009
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[in Japanese]1961 Volume 15 Issue 10 Pages 679-682
Published: October 10, 1961
Released on J-STAGE: November 17, 2009
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