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41 巻, 7 号
選択された号の論文の8件中1～8を表示しています
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佐渡 篤1987 年 41 巻 7 号 p. 555-564
発行日: 1987/07/01
公開日: 2010/10/27
ジャーナル フリーX-ray photoelectron spectroscopy (ESCA) has been found to be a powerful tool with ability to study the surface characteristics of pulp and paper.
In this paper, some applications of ESCA to pulp fibre and paper were reviewed for recent five years. Curve deconvolution of C18 peak and derivatization technique have been fovourably used in works on pulp and paper. ESCA has brought about many significant informations to the field for pulp and paper research.抄録全体を表示PDF形式でダウンロード (1469K) -
漆畑 英明, 富樫 文彦, 佐藤 利男, 刑部 健一1987 年 41 巻 7 号 p. 565-573
発行日: 1987/07/01
公開日: 2010/10/27
ジャーナル フリーPDF形式でダウンロード (1322K) -
新しい波と古い波吉田 英夫1987 年 41 巻 7 号 p. 574-582
発行日: 1987/07/01
公開日: 2010/10/27
ジャーナル フリーIt might be said that there are “two waves” which we have experienced recently. One is a “new wave” of screen technology which has improved very much in screening performance by contoured screen plate.
After reviewing the performances of existing contoured screen plates, ISHIKAWAJIMA INDUSTRIAL MACHINERY CO., LTD. has developed the DIMPLE SCREEN PLATE which improved screen performance dramatically, that is the capacity increase in 30-50% with keeping or improving the screening efficiency.
The basic principle of existing contoured screen plate is micro turbulence which is generated on the surface of screen plate, and misalignes the stock flow and breakes fiber mat.
The micro turbulence on DIMPLE SCREEN PLATE remixes the fiber mat but does not misalign the stock flow on the screen surface, so that screening efficiency can be kept higher than other contoured screen plates.
The other one is “old waves” of pulsation problem on paper machine approach screen. A simulation test was carried out to analyze the pulsation characteristics between high speed screen and low speed screen.
The result of this test shows that high speed screen has more wide capability to dodge the pulsation trouble than low speed screen.抄録全体を表示PDF形式でダウンロード (1648K) -
亀山 秀雄1987 年 41 巻 7 号 p. 583-591
発行日: 1987/07/01
公開日: 2010/10/27
ジャーナル フリーIn this paper, the principle of chemical heat pump technology are explained, and the research and development on catalist-assisted chemical heat pump with reaction couple of acetone hydrogenation/2-propanol dehydrogenation for upgrading low-level thermal energy around 80°C to high-level thermal energy around 200°C are shortly reviewed and it's application to pulp and paper industry are discussed.抄録全体を表示PDF形式でダウンロード (1361K) -
吉村 隆重, 原 啓志, 岡山 隆之, 大江 礼三郎1987 年 41 巻 7 号 p. 595-600
発行日: 1987/07/01
公開日: 2010/10/27
ジャーナル フリーDrainage of water from a paper machine is a dynamic process that occurs during a very short time. So the dynamic wettability of paper making wires were observed from the point of the contact angle of a water drop on a fabrics surface in every 10 ms.
Contact angles on dry fabrics of small mesh numbers were low. However, they were little depended on the mesh number, when the fabrics were wet. Though physical characteristics of wire filaments were related to dynamic wettability in a dry state, rapid decreases in the contact angles were shown in plastic multi-layer and broze fabrics in wet states.抄録全体を表示PDF形式でダウンロード (1774K) -
第1報-高濃度黒液の粘度塚本 治夫, 市川 充, 中野 達男, 奈倉 道博1987 年 41 巻 7 号 p. 601-613
発行日: 1987/07/01
公開日: 2010/10/27
ジャーナル フリーSoda quinone (AP) and kraft cooking were carried out using softwoods (Douglas fir from North America, domestic red pine) and hardwoods (Eucalyptus from Tasmania, domestic oak). Black Liquor obtained were concentrated to the extent of 70-90% solids concentration in the laboratory in order to compare with the various physical and chemical properties of AP and KP black liquor. This articls deals with the viscosity of high solids AP and KP black liquor measured by “Flow Tester”.
AP black liquor has higher viscosity about 5-10 fold than KP black liquor at the same concentration and temperature. Viscosity of AP and KP black liquor of various softwoods and hardwoods is classified to three groups and viscosity of each groups differs by a factor of 5-10 times.
To investigate the reason for the difference of viscosity of AP and KP black liquors, the influence of four factors was checked.(1) residual alkali (2) ash content as organic/inorganic ratio (3) molecular weight of lignin (4) lignin content in black liquor.
Molecular weight and molecular weight distribution of lignin were not recognized as the cause for the difference of viscosity of AP and KP black liquor. Viscosity of softwoods black liquor is profoudly affected by the difference of residual alkali which is caused by the difference of alkali charge in the AP and KP cooking抄録全体を表示PDF形式でダウンロード (1616K) -
田中 浩雄1987 年 41 巻 7 号 p. 614-624
発行日: 1987/07/01
公開日: 2010/10/27
ジャーナル フリーUsing 25 kinds of cationic polyacrylamides (C-PAMs) prepared by Hofmann reaction with PAMs having 5 different degrees of polymerization (DP: 610-49000) in such a way that 5 levels of charge density (1.4-8.6 meq/g) are produced for each DP, effects on drainage and retention of unbleached softwood kraft pulp (CSF: 375 ml), bleached hardwood kraft pulp (CSF: 425 ml) and thermomechanical pulp (CSF: 168 ml) have been studied. Results obtained are as follows:
(1) When an addition level of C-PAM was low, as indicated by 0.05% on pulp, the higher both DP and charge density, the greater were Canadian standard freenesses (CSF) of all pulps. As CSF became greater, lower CSF tester white water consistency, that is, higher retention was achieved.
(2) The characteristics of C-PAM showing the highest CSF and retention were gradually shifted to lower DP and/or lower charge density, as the addition level of C-PAM on pulp increased.
(3) These phenomena were explained on the basis of the balance between the bridging effect and the electrostatic repulsion of C-PAM. With an increase in DP of C-PAM, the bridging effect became greater, though the electrostatic repulsion developed at a lower addition level of C-PAM.抄録全体を表示PDF形式でダウンロード (1903K) -
1987 年 41 巻 7 号 p. 625
発行日: 1987/07/01
公開日: 2010/10/27
ジャーナル フリーPDF形式でダウンロード (172K)
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