紙パ技協誌
Online ISSN : 1881-1000
Print ISSN : 0022-815X
ISSN-L : 0022-815X
42 巻, 4 号
選択された号の論文の8件中1~8を表示しています
  • 藤原 秀樹
    1988 年 42 巻 4 号 p. 317-329
    発行日: 1988/04/01
    公開日: 2009/11/16
    ジャーナル フリー
    ESCA (Electron Spectroscopy for Chemical Analysis) or XPS (X-ray photoelectron Spectroscopy) is now a familier tool in solid surface chemistry. Some studies have been done with respect to the surface characterization of pigment coated paper.
    In this paper, recent applications of ESCA in the field of pigment coated paper were reviewed.
  • 小林 良生, 田辺 寛之
    1988 年 42 巻 4 号 p. 330-338
    発行日: 1988/04/01
    公開日: 2009/11/16
    ジャーナル フリー
    Mechanistic investigations on biochemical pulping of bast fibers were overviewed from viewpoints of biochemical properties of enzymes causing maceration and solubilized components.
    The pulping using pectinolytic enzymes secreted by Erwinia carotovora was found to proceed by maceration as the result of concerted reaction of endo-pectate lyase (endo-PATE) and endo-pectin lyase (endo-PNTE). The endo-PATE was composed of 4 kinds, or sometime 2 kinds, of pI-isozyme, depending on the strains used. The optimal constitution ratio of endo-PATE to endo-PNTE was approximately 30 : 1.
    Both in alkaline presoaking and enzymatic pulping, lignin-carbohydrate complexes with molecular weight of 20, 000-25, 000 were found to be eluted.
    As to aggregation between pectic substance and LCC, endo-PATE yielded the elution of LCC rich in L-arabinose and D-galactose, while endo-PNTE produced that mainly composed of D-xylose in the pulping of mitsumata (Edgeworthia papyrifera Sieb. et Zucc.). This result was commented in relation with biosynthesis process of hemicellulose.
  • 空閑 重則
    1988 年 42 巻 4 号 p. 339-344
    発行日: 1988/04/01
    公開日: 2009/11/16
    ジャーナル フリー
  • 石黒 久三郎
    1988 年 42 巻 4 号 p. 345-352
    発行日: 1988/04/01
    公開日: 2009/11/16
    ジャーナル フリー
  • ヘッドボックスに関する研究開発
    菅原 洋, 和田 清, 清水 徹, 野村 忠義
    1988 年 42 巻 4 号 p. 353-367
    発行日: 1988/04/01
    公開日: 2009/11/16
    ジャーナル フリー
    Development of an improved headbox, an important component in the high consistency forming process, resulted in the following : Fundamental analysis of changes in non-uniformity of consistency in high consistency pulp suspension, conducted in a duct model with various turbulence generators, proved possibility of dispersing flocks with little re-flocculation where a proper shape, dimension and arrangement were selected.
    Saw-blade type flow channel created from such findings was the most preferable as a headbox element, with acceptable sheet formation resulting from good dispersion and smooth jet surface.
    Survey was made on the pilot plant about the combination of headbox and former.
    Samples obtained from the pilot plant tests well coincided with the headboxes' valuation.
  • バイサルファイト前処理CTMPのリファイニングによる形態的変化
    小島 康夫, 尹 承洛, 香山 彊, 堀野 政司, 竹田 昌史
    1988 年 42 巻 4 号 p. 368-382
    発行日: 1988/04/01
    公開日: 2009/11/16
    ジャーナル フリー
    Birch chips, treated with bisulfite at various yield (70-90%), were fiberized in the Asplund Laboratory Defibrator D (as the first refining) and refined in the PFI mill (as the second refining) to produce CTMP.
    The effects of pretreatment yields and refining temperatures on the fiber length distributions and fiber surface structures of CTMP were discussed. In addition, the relationships between morphlogical properties of the fines and the sheet strength properties were discussed.
    At the yield of pretreated chips less than 84%, the fiber wall of the pretreated chips were ruptured between the primary wall and the middle lamella on the fiberizing stage, and then the fibers were seperated without damaging. The fines generated on this stage consisted of the ray cell and the flake-like fragments which were derived from the middle lamella and the primary wall layer.
    At the yield of pretreated chips more than 90%, the pretreated chips were fiberized in a similar manner descrived above. However, the presence of fragments derived from the cell wall was found in the fines fraction.
    In the case of various yields, there is no significant differences in the long fiber (> 48 mesh) contents of the pulps produced on the fiberizing stage.
    When the defibration temperture decreased from 130°C to 100°C or 20°C, the fibers were significantly damaged during the fiber seperation, and the contents of the long fiber decreased.
    Fiber surface structures and the fiber length distributions showed that the fibers produced from the pretreated chips with a yield of 93% were subjected to destruction on the refining stage, and decreased the long fiber contents. The fines generated on this stage contained more fiber wall fragments.
    This tendency was reduced with decrease of the pretreatment yield, and a larger portion of the fines consisted of the fillament-like fragments which were derived from the secondary wall by peeling from the fiber surface.
    The fines generated on the fiberizing stage were less effective to the sheet strength properties. On the other hand, the fines generated on the refining stage consisted of the fillament-like fragments which derived from the secondary wall, and were more effective to the inter fiber bonding.
  • 西部 郁孝, 大久保 克美, 石川 久雄
    1988 年 42 巻 4 号 p. 383-398
    発行日: 1988/04/01
    公開日: 2009/11/16
    ジャーナル フリー
    White-rot fungi, which have the ability to degrade selectively lignin in wood, are of great interest in bio-pulping processes. It was already demonstrated that enough lignin can be degraded to cause a decrease in the energy demand for the production of TMP and RGP, if wood chips are pretreated by cellulase-less mutants of white-rot fungi.
    The degradation of 1st- and 2nd-refined TMP with Phanerochaete chrysosporium and Coprinus cinereus, which were screened among 86 strains in 65 species of main white-rot fungi, was carried out under the optimal conditions at 0.3 rpm.
    Under the degrading conditions in the presence of glucose and urea, the observed difference was that tear and burst factors of TMP degraded with both fungi are same or increase than each factor of the pulp before the degradation. Degraded 1st-and 2nd-refined TMP had lower brightness values. The former degraded TMP was more easily to bleach with H2O2 or NaOCl· H2O2 than the later degraded pulp, and the brightness value after bleaching was about 80% GE.
    When one compared degraded TMP with sound TMP, it became evident that the fiber length distribution and fiber flexibility of TMP change by initial bio-degradation.
  • 1988 年 42 巻 4 号 p. 400-402
    発行日: 1988/04/01
    公開日: 2009/11/16
    ジャーナル フリー
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