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Volume 31, Issue 11
Displaying 1-12 of 12 articles from this issue
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1977 Volume 31 Issue 11 Pages 59-61
Published: November 01, 1977
Released on J-STAGE: November 11, 2009
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Itsuki Nishi1977 Volume 31 Issue 11 Pages 720-730
Published: November 01, 1977
Released on J-STAGE: November 11, 2009
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1977 Volume 31 Issue 11 Pages 730
Published: 1977
Released on J-STAGE: November 11, 2009
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1977 Volume 31 Issue 11 Pages 730a
Published: 1977
Released on J-STAGE: November 19, 2010
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1977 Volume 31 Issue 11 Pages 730b
Published: 1977
Released on J-STAGE: November 19, 2010
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J. TAPPI1977 Volume 31 Issue 11 Pages 731-743
Published: November 01, 1977
Released on J-STAGE: November 11, 2009
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Kaname Hoya1977 Volume 31 Issue 11 Pages 744-748
Published: November 01, 1977
Released on J-STAGE: November 11, 2009
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Teruhiko Yonezawa1977 Volume 31 Issue 11 Pages 749-754
Published: November 01, 1977
Released on J-STAGE: November 11, 2009
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Taiji Ohashi1977 Volume 31 Issue 11 Pages 755-760
Published: November 01, 1977
Released on J-STAGE: November 11, 2009
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1977 Volume 31 Issue 11 Pages 761
Published: November 01, 1977
Released on J-STAGE: November 11, 2009
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Strength of Pulp Sheet and Recovery of Methanol.Junzo Nakano, Chiyoko Takatsuka, Hideki Daima, Masaaki Kobayashi, Nobu ...1977 Volume 31 Issue 11 Pages 762-766
Published: November 01, 1977
Released on J-STAGE: November 11, 2009
JOURNAL FREE ACCESSAlkali-methanol cooking has been studied as one of the pollution free pulping methods. This paper deals with the sheet strength of alkali-methanol pulp and the recovery of methanol in black liquor. The results obtained are summarized as follows.
(a) Screened pulp yield by alkali-methanol cooking are 45% higher than that by kraft cooking. Active alkali concentration of alkali-methanol cooking liquor should be lower than that of kraft cooking liquor. This is explained by the “Escaping theory” by O. Maass (1941).
(b) Comparing at the same level of lignin content in pulp, there is no difference between the sheet strength of both pulps except tear factor.
(c) The consumption and operation loss of methanol during cooking are assumed to be 1321 kg on the basis of ton chips. Some portion of methanol, 613 kg/ton chips, however, comes from lignin and hemicellulose.
(d) The removal of methanol during washing process of pulp is easier than that of sodium hydroxide. Methanol is recovered easily in the evaporation of black liquor.View full abstractDownload PDF (600K) -
Studies on the Manufacture of the Synthetic Fiber Paper of Graft Copolymer (III)Masashi Nishiyama1977 Volume 31 Issue 11 Pages 767-774
Published: November 01, 1977
Released on J-STAGE: November 11, 2009
JOURNAL FREE ACCESSPolystyrene was grafted onto heat-treated polyvinyl alcohol (PVA) fibers using persulfate or peroxide as catalysts. When ammonium or potassium persulfate were used as catalysts, the graft efficiencies of about 4060% were obtained under suitable conditions. Using the styrene grafted PVA fibers of various degrees of grafting (10100%), synthetic fiber papers were prepared and coated with homopolymeric polystyrene solution. The ratio of the styrene grafted PVA fibers to polystyrene was 5 : 3.
These papers were air-dried or heat-treated at 110°C.
In the case of heat-treated papers, breaking length at first increased with increasing degree of grafting, reached constant value over the degree of grafting about 40%. Breaking length of air-dried papers showed constant value. Burst factor showed also same tendency. Tear factor of heat-treated papers showed maximum value at the degree of grafting about 15%, but in the case of air-dried papers, tear factor diminished with increasing degree of grafting.
Such changes in properties of grafted papers have been interpreted in terms' of heat adhesive effect of grafted polystyrene.View full abstractDownload PDF (886K)
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