巻号一覧
前身誌
42 巻, 8 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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渡辺 鋼市郎, 甘利 武司1988 年 42 巻 8 号 p. 697-709
発行日: 1988/08/01
公開日: 2009/11/16
ジャーナル フリーInk transfer and penetration are of great importance in printing processes. These phenomena were reviewed from a viewpoint of an interaction between the printing ink and the paper stock having a porous structure.
An ink transfer equation can be represented using an amount of fixed ink on paper surface and a coefficient of ink splitting. The amount of fixed ink depends on printing speed, printing pressure, ink viscosity, and the porosity of paper. The coefficient of ink splitting is also affected by the porosity of paper extremely.
The initial setting of printing ink is greatly influenced by the speed of ink penetration which depends on the porosity of the paper. A large part of total pore volume of paper is attributable to an amount of interfibrillar gap. Ink penetration can be monitored by the reflection density of the reverse side of the printed paper using a photoelectric reflectometer as employed by Voet and Brand.
The phenomenon of ink penetration can be predicted by Lucas-Washburn's equation or Olsson-Pihl's equation the penetration depth increases in proportion to square root of time and mean radius of pore.
For a coated paper, the pore structure in the coating layer is different from that in the body stock and the pore size of the former is extremely small. The pore structure in the coating layer behaves as a filter, only ink vehicle penetrates into the coated stock and the penetration speed is not so fast.
The measurement of the time dependence of the penetration depth is an effective method to investigate the capillary structure in paper stocks. We can also evaluate the ink-setting characteristics from the dependence of penetration depth on time.抄録全体を表示PDF形式でダウンロード (2475K) -
中村 基史1988 年 42 巻 8 号 p. 710-716
発行日: 1988/08/01
公開日: 2009/11/16
ジャーナル フリーIt is about 20 years since synthetic pulp was developed. In the beginning we thought that synthetic pulp could be a material as substitute to replace wood pulp. Afterwards the synthetic pulp had faced twice the oil crises, so that the aim of it on first stage had to be given up on economical standpoint.
At the present, however, synthetic pulp can get a position as a pulp-like special fiber in various fields, thanks of so much efforts in Pulp & Paper industry and others.
Synthetic pulp is a highly fibrillated and hydrophillic polyolefine fiber similar to wood pulp and is characterized by binding effect, heat sealability, water resistance, pore size controllability, powder capturing effect, thixotropic property and so forth. So by making the best use of these characteristics, synthetic pulp has been used not only in special paper field (battery separator, heat sealable paper, etc) but also in sanitary goods (diaper, etc) and asbestos replacement field.抄録全体を表示PDF形式でダウンロード (1215K) -
尾鍋 史彦1988 年 42 巻 8 号 p. 717-728
発行日: 1988/08/01
公開日: 2009/11/16
ジャーナル フリーThis report summarizes the presentations at the 1987 International Paper Physics Conference held in Canada from September 15 to 18, 1987. This paper describes also the recent trend of paper physics research from the world-wide perspective based on the experience of the author's attendance at the conference along with the author's individual viewpoints on the problems for the future.抄録全体を表示PDF形式でダウンロード (8866K) -
石黒 久三郎1988 年 42 巻 8 号 p. 729-735
発行日: 1988/08/01
公開日: 2009/11/16
ジャーナル フリーPDF形式でダウンロード (1034K) -
豊福 正道1988 年 42 巻 8 号 p. 736-742
発行日: 1988/08/01
公開日: 2009/11/16
ジャーナル フリーOur Maruishi-Celleco's CENTERDISC disc filter for fiber recoverry and stock thickening is probably the most significant filter.
The CENTERDISC filter's large capacity range combined with its ability to hadle high-freeness pulps make it an economic alternative for applications where previously it was only technically possible to use drum filters.
The new filter offers substantially higher discharge consistencies and cleaner filtrate than other disc filters. Because of the ingenious design of the rotor there is no need for the “chutes” between the discs, thus completely eliminating operating and maintenance-related problems inherent in other disk filters.抄録全体を表示PDF形式でダウンロード (5832K) -
高濃度抄紙技術の研究開発 (第6報)野村 忠義, 和田 清, 野村 實, 吉村 三郎, 安藤 美代治, 三上 敏明1988 年 42 巻 8 号 p. 743-760
発行日: 1988/08/01
公開日: 2009/11/16
ジャーナル フリーHCF pilot plant, capable of various sheet forming tests, was constructed in the Technical Research Institute of Hitachi Zosen Corp., at Sakurajima, Osaka. It was started up in Nov., 1985. Each group's technology which had been developed by small scale forming tests was confirmed by the individual tests. Then combined and consolidated tests were carried out. Resident researchers from RAPPT member companies devoted themselves to develop the printing and writing paper produced at high head box cosistency.
Achievements are as follows :
(1) The formation, printability and coating-capability in HCF test sheet proved to be as good as those of the conventional fine paper.
(2) With increasing head box consistency, Z-direction strength (Scott internal bonding strength) increased, but tensile strength tended to decrease, and one pass retention, both of the fiber and filler, increased remarkably.
(3) The solid content in the wet sheet was affected by the freeness of furnish but not by consistency.
Required solution :
From practical viewpoint of HCF, accurate lip opening is essential for good profile, since the lip opening is only 2 mm for 60 g/m2 at 3%.
Expected application :
In producing solid board, HCF is more profitable than multiplies forming, because additives such as starch need not be required for reinforcing the ply-adhesion.抄録全体を表示PDF形式でダウンロード (5553K) -
大江 礼三郎, 大盛 啓一, 牛山 榮一, 岡山 隆之1988 年 42 巻 8 号 p. 761-772
発行日: 1988/08/01
公開日: 2010/02/09
ジャーナル フリーAs well known, acidity of paper accelerates its degradation, as confirmed in the previous report. In this paper, deacidification of paper with various alkoxymagnesium alkylcarbonates and diethylzinc was investigated.
These agents had a clear suppressing effect on degradation of paper, but little effect on pre-degraded paper. Concerning the effect of pH, alkoxy-magnesium alkylcarbonates are more effective than diethyl-zinc, though only 0.5% of zinc in paper is sufficient enough for retarding degradation of paper.
Diethyl-zinc can penetrate into paper stack and it distributes rather uniformly, which could be observed in electronmicrographs.抄録全体を表示PDF形式でダウンロード (1454K) -
1988 年 42 巻 8 号 p. 773-775
発行日: 1988/08/01
公開日: 2009/11/16
ジャーナル フリーPDF形式でダウンロード (393K)
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