紙パ技協誌
Online ISSN : 1881-1000
Print ISSN : 0022-815X
ISSN-L : 0022-815X
49 巻, 7 号
選択された号の論文の12件中1~12を表示しています
  • 横山 幸夫
    1995 年 49 巻 7 号 p. 1019-1027
    発行日: 1995/07/01
    公開日: 2009/11/16
    ジャーナル フリー
    High rate of growth are expected in the Pulp and Paper Industry of Indonesia, Thailand, China and Vietnam. These countries have great potentiality of becoming the most important area for the further development of Japanese Pulp and Paper Industry in the next century.
    The growth mainly result from the high rate of economic growth in these countries and various factors peculiar to each country.
  • 井上 聡
    1995 年 49 巻 7 号 p. 1028-1040
    発行日: 1995/07/01
    公開日: 2009/11/16
    ジャーナル フリー
  • Kari K. Kovasin, Panu O. Tikka
    1995 年 49 巻 7 号 p. 1041-1049
    発行日: 1995/07/01
    公開日: 2009/11/16
    ジャーナル フリー
    Recent developments in kraft batch cooking have resulted in new generations of highly energy efficient displacement batch processes. Further studies have shown that the full-displacement batch concept gives the best results in terms of cooking uniformity and pulp quality. The SuperBatchTM process combines these advantages with optimized cooking chemistry enabling revolutionary low kappa numbers with sustained pulp quality. So far eight SuperBatchTM system have been sold of which half are in operation with excellent results with softwood and hardwood species. The present paper summarizes and discusses the results from tropical hardwood species, four Eucalyptus and one Acacia, obtained by a new SuperBatch pilot plant. It is shown that high quality hardwood pulps can be produced over a wide range of kappa numbers from 10 to conventional levels with excellent bleachability.
  • 後藤 英雄
    1995 年 49 巻 7 号 p. 1050-1061
    発行日: 1995/07/01
    公開日: 2009/11/16
    ジャーナル フリー
    The use of non-wood materials to manufacture pulp and paper products are being watched with keenest interest for the purpose of preserving the global environment.
    Preliminary feasibility study on the project to manufacture kenaf based pulp in Yuanjiang City, Hunan Province, China have been completed by the team of Global Environmental Forum (GEF) and Japan Kenaf Association (JKA) in June 1994.
    This article is organized into an introduction and some chapters. The chapters are as follows : Outlines of the project on kenaf based pulp manufacturing in China ; Pulp and paper industry in China ; Kenaf for paper pulp production ; Pulping of kenaf, Summary of subjects investigated during a business trip in China ; and Conclusions.
  • 徐 増懐
    1995 年 49 巻 7 号 p. 1062-1067
    発行日: 1995/07/01
    公開日: 2009/11/16
    ジャーナル フリー
    The white coated paperboard production in China is expected to be 800, 000 MT at 1995. The main plants of the white paperboard in China are listed with some equipments.
    Their performances are comparatively examined with imported ones. It's concluded that they had been improved in appearance but some problems remain in performances of uniformity, box convertibility and printability yet.
    In order to improve them the author appoints three terms or the selection of raw fiber material, the production technology improvement and the utilization of paper chemicals.
  • 鈴木 隆, 松原 清
    1995 年 49 巻 7 号 p. 1068-1077
    発行日: 1995/07/01
    公開日: 2009/11/16
    ジャーナル フリー
    Representative 35 kinds of water quality and circumstances of the waste water discharge regulation in Asian 8 countries such as China, Korea, Taiwan, Philippines, Indonesia, Singapore, Malaysia and Thailand are explained. Furthermore, conditions of water treatments are described when these waters are applied for boiler and cooling water systems.
  • 山田 卓良
    1995 年 49 巻 7 号 p. 1078
    発行日: 1995/07/01
    公開日: 2009/11/16
    ジャーナル フリー
  • ワラ類の化学パルプ化 (II)
    中野 準三, 北仲 由美子, 津田 祐子, 矢田 英律, 石津 敦
    1995 年 49 巻 7 号 p. 1079-1085
    発行日: 1995/07/01
    公開日: 2009/11/16
    ジャーナル フリー
    Soda lignin from rice straw was sulfomethylated, and the dispersion ability of sulfomethylated lignin was compared with that of commercial softwood lignosulfonate. The results are summarized as follows :
    (1) Black liquor from soda cooking of rice straw was adjusted to pH 8.2 with aq. sulfurous acid. Same mole of formaldehyde as sodium sulfite formed in black liquor was added, and then dissolved lignin was directly sulfomethylated (SML I). Sulfomethylated black liquor was separated by gel filtration method (SML II : 0.18 S/C6-C3).
    (2) SML I shows the similar standard dispersion number (SDN), regardless of max. temperature of soda cooking and reaction time of sulfomethylation.
    SDN of sulfomethylated liquor including SWL I, however, is inferior to that of lignosulfonate. This may be due to the low content of sulfonic acid group and low purity of SML I. In order to utilize straw soda lignin as dispersant, it is necessary to isolate soda lignin from black liquor and to sulfomethylate the isolated soda lignin.
    (3) The setting time of mortar with SML II show the relatively similar results to that of commercial lignosulfonate. SML I, however, requires a long period of the setting time. The utilization of SML I as the dispersant is impractical in mortar manufacture.
    (4) The dispersion effect with SML II was compared by the use of various types of additives. Among seventeen additives tested here, citric acid, gluconic acid, glucuronic acid and K, H-glucarate show the excellent SDN. Very high SDN shown by K, H-glucarate is worth noting.
  • 武藤 直一, 高橋 公也, 山崎 秀彦
    1995 年 49 巻 7 号 p. 1086-1097
    発行日: 1995/07/01
    公開日: 2009/11/16
    ジャーナル フリー
    Low energy electron beam irradiating instruments are applied for surface treatment and paint cure because of their compactness compared with corresponding high energy instruments. As electron beam has higher transmittance than UV light, it is supposed to be suitable for high-speed curing of relatively thick ink film such as intaglio ink film.
    However, electron beam irradiation causes degradation of organic high-polymer induced by radical reaction, involving the main chain scission and crosslinking reaction of the polymer. In the case of paper, electron beam irradiation decreases degree of polymerization of cellulose and sheet strength.
    In this paper the effects of electron beam irradiation on the physical and chemical properties of handsheets were studied.
    Following results were obtained.
    (1) The fiber strength of the handsheets, given by the wet zero-span breaking length, decreased with electron beam irradiation, while the fiber bonding strengths, as given by Pulmac B factor, wet breaking length and Young's modulus, increased. Besides, the microphotographs of the fractured areas of the handsheets showed that the sheet fracture pattern shifted from the inter-fiber bond breakage mode to the fiber breakage mode.
    (2) The contributions of the fiber strength and fiber bonding strength to the double folds and tensile strength were determined by multiple regression analysis using the equation T=kFaBbLc (T : Physical property of handsheet, F : Fiber strength, B : Fiber bonding strength, L : Fiber length, k, a, b, c : Parameter). It was found that the decreases of double folds and tensile strength caused by electron beam irradiation are mainly attributed to the decrease of fiber strength.
    (3) The GPC analysis of the irradiated handsheets showed that the decrease of fiber strength is caused by the decrease of degree of polymerization of cellulose.
    (4) With high dose of irradiation different kinds of pulp sheets showed similar values of probability of main chain scission, while with low dose of irradiation each pulp sheet showed different value of that.
    (5) Amount of chemical groups such as aldehyde and carboxyl groups and copper number of the handsheets increased with irradiation.
  • ユーカリの材質育種における選抜指標抽出に関する研究 (第4報)
    小名 俊博, 園田 哲也, 伊藤 一弥, 柴田 勝
    1995 年 49 巻 7 号 p. 1098-1108
    発行日: 1995/07/01
    公開日: 2009/11/16
    ジャーナル フリー
    Molar ratio of neutral sugars constituting hemicellulose were analysed for Eucalyptus camaldulensis and E. globulus to do quality breeding using an increment core without cutting the tree.
    For E. camaldulensis, glucose, xylose and galactose had the tendency of higher ratio in pith side, in pith side and lower parts, and in bark side and upper parts of the trunk, respectively. But rhamnose had almost no within-tree variation, and arabinose and mannose did not have the tendency. For E. globulus, glucose and xylose had the tendency of higher ratio in bark side, and in pith side respectively. But galactose did not have the tendency, and rhamnose, arabinose and mannose had almost no within-tree variation.
    The whole-tree values were as follows ; glucose : xylose : galactose : rhamnose : arabinose : mannose = 13.8 : 51.1 : 20.4 : 0.7 : 7.8 : 6.3, and 12.3 : 69.4 : 13.2 : 0.6 : 2.9 : 1.6 in E. camaldulensis, and 12.1 : 61.4 : 16.1 : 1.0 : 3.6 : 5.8 and 9.4 : 77.2 : 5.8 : 1.0 : 2.7 : 3.9 in E. globulus. Since the ratio of xylose, considered as xylan, would be higher in E. globulus, hemicellulose in E. globulus could remain more after kraft pulping.
    Under 3.3 m, representative heights, the whole-tree values ± 5%, were glucose : 2.8 3.3 m, xylose : 3.3 m, galactose : 2.3 m, rhamnose : 0.3 3.3 m, arabinose : 2.8 m, and mannose : 1.8m for E. camaldulensis. And 1.32.8m, 0.30.8m, 3.3 m, none, 0.33.3m, 1.33.3m, and 1, 8 m for E. globulus. These heights did not relate to the whole-tree height and the difference of within-tree variation.
    It is expected that whole-tree pulp properties are predicted by the increment core taken from these representative heights.
  • 1995 年 49 巻 7 号 p. 1109-1115
    発行日: 1995/07/01
    公開日: 2009/11/16
    ジャーナル フリー
  • 粉粒体担持シート並びにその製造方法
    前島 正治, 藤江 幸男
    1995 年 49 巻 7 号 p. 1116-1119
    発行日: 1995/07/01
    公開日: 2009/11/16
    ジャーナル フリー
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