紙パ技協誌

訂正

1978 年 32 巻 11 号 p. 78
発行日: 1978年
公開日: 2009/11/10

DOIhttps://doi.org/10.2524/jtappij.32.11_78

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紙類の規格制定の発端とその経緯 (2)

特に紙の寸法規格について

米谷稔

1978 年 32 巻 11 号 p. 607-618
発行日: 1978/11/01
公開日: 2009/11/10

DOIhttps://doi.org/10.2524/jtappij.32.11_607

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工場紹介(4)

三興製紙(株)富士工場

三興製紙株式会社

1978 年 32 巻 11 号 p. 619-627_1
発行日: 1978/11/01
公開日: 2009/11/10

DOIhttps://doi.org/10.2524/jtappij.32.11_619

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洋紙製法考

-佐賀,小出千之助謹訳-

関義城

1978 年 32 巻 11 号 p. 628-634
発行日: 1978/11/01
公開日: 2009/11/10

DOIhttps://doi.org/10.2524/jtappij.32.11_628

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パピルス

1978 年 32 巻 11 号 p. 635
発行日: 1978/11/01
公開日: 2009/11/10

DOIhttps://doi.org/10.2524/jtappij.32.11_635

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KP臭気排水ストリッピングアンケート調査結果

中山和夫, 高山哲

1978 年 32 巻 11 号 p. 636-639
発行日: 1978/11/01
公開日: 2009/11/10

DOIhttps://doi.org/10.2524/jtappij.32.11_636

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硫酸ナトリウムと二酸化硫黄を蒸解薬液とするケミメカニカルパルプ (SOXパルプ) - (第1報)

新しいプロセスの可能性についてパルプ廃液の完全処理と利用に関する研究 (IV)

御田昭雄, 片寄公一, 森悦夫, 笹原猛, 山本登久男, 勝地光雄, 勝山敦弘, 平井久夫, 赤羽利昭

1978 年 32 巻 11 号 p. 641-653
発行日: 1978/11/01
公開日: 2009/11/10

DOIhttps://doi.org/10.2524/jtappij.32.11_641

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A feasibility study on a new chemimechanical pulping process including a new chemical recovery process from waste liquor was conducted. A new type of high-yield chemimechanical pulp was produced from raw cellulosic materials which were lightly heated in aqueous solution of sodium sulphate and sulphur dioxide (as Na₂O, 1060 g/l, SO₂ 1073 g/l) and then mechanically treated with a single disk refiner. It was found that a plain sodium sulphate solution has no cooking potential.
Wood SOX pulp of high yield (4585%) and of high grade was produced from softwood, hardwood, and tropical wood. Yezo spruce SOX pulp (yield 68%) gave 29.7% brightness, by Hunter 0.608g/cm³ bulk density, 7.81 km breaking length, 4.77 JIS burst factor, and 43.9 tear factor.
Nonwood SOX pulp of high yield (4863%) and high grade was produced from bamboo, rice straw, and bagasse. Rice straw SOX pulp (yield 63.2%) gave 84.1 Kappa no., 12.7% pentosan, 20.9% ash, 39.6% brightness, 0.479g/cm³ bulk density, 3.02 km breaking strength, and 1.61 JIS burst factor.
Water soluble, crude sodium sulphate;KP fly ash from precipitator in recovery unit (Na₂SO₄ 97.3%, Na₂CO₃ 1.2%) and ash from NSSC waste liquor (Na₂SO₄ 64.7%, Na₂CO₃ 30.0%) were also used for SOX cooking.
Recovery of SOX cooking chemicals was proven to be quite easy. Upon incinerating concentrated waste liquor, sodium sulphate was recovered from ash, while sulphur dioxide was recovered from relief gas and gas produced during incineration of waste liquor.

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シート乾燥時の収縮挙動について

紙の伸縮安定性に関する研究第2報

木島常明, 山川功

1978 年 32 巻 11 号 p. 654-659
発行日: 1978/11/01
公開日: 2009/11/10

DOIhttps://doi.org/10.2524/jtappij.32.11_654

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This paper was described on the relation of wet web shrinkage and shrinking stress of several hand made sheets in which tested by change the freeness, basis weight and sample size etc. Results obtained were summerized as follows :
1) Moisture contents of the wet web in which be able to detect the change of shrinkage clearly were approximately same as moisture contents of water retention value.
2) Stress caused by drying was expressed as the force per unit cross area of the sheets. They were estimated to be 20 to 80 kg/cm² for the furnishes of 600 to 100 ml C.S.F.
3) They were related with the physical properties of sheets which were affected by fiber to fiber bonding, for instance, density and light scattering coefficient.
4) Tensile strength of the sheets during and after drying was equivalent to about ten times as much as the drying stress.

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過酢酸気相漂白したホロセルロースパルプの強度特性について

パルプ漂白に関する研究第8報, パルプの過酢酸気相漂白に関する研究 (第5報)

大久保克美, 沖妙, 石川久雄

1978 年 32 巻 11 号 p. 660-668
発行日: 1978/11/01
公開日: 2010/01/22

DOIhttps://doi.org/10.2524/jtappij.32.11_660

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Chlorite hollocellulose pulps (NUHP and LUHP) prepared from Douglas fir and eucalyptus chips at room temperature or 50°C were treated by peracetic acid (PA) bleaching in vapor phase or by multistage (MS) bleaching under the various conditions.
The mechanical strength, pentosan contents and density of NBHP or LBHP sheet at equal freeness were measuerd. The viscosity of these pulps in a cupri ethylenediamine solution was also determined.
The results obtained are summarized as follows.
1.The sheet strength of PA-or MS-bleached NHP increased proportionally with increasing viscosity of those bleached pulps in the range of 3 to 12 cp, and also the strength increased linearly with increasing pentosan contents of the pulps in the range of 2.5 to 4.5%. The similar proportional relationship was observed for both PA-and MS-bleached LHP (viscosity of pulp : 4to 8 cp, pentosan contents;6.0 to 9.0%). On the other hand, a linear relationship between the sheet density and pentosan contents of NBHP or LBHP was found to be observable in the range of 2.4 to 4.0% of pentosan contents in former pulp and in the range of 6.0 to 9.0% of pentosan contents in the latter pulp.
2. From the results of sugar analysis and gel filtration of hemicellulose isolated from NBHP or LBHP with 5% KOH, it was revealed that uronic acid-rich or pectin-rich hemicellulose has no effects on the density and mechanical strength of NBHP or LBHP sheet. A decrease of xylan contents in BHP during PA-and MS-bleaching was more rapid than that of other hemicellulose contents.

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海外技術ニュース

1978 年 32 巻 11 号 p. Preface3-Preface10
発行日: 1978/11/01
公開日: 2009/11/10

DOIhttps://doi.org/10.2524/jtappij.32.11_Preface3

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