巻号一覧
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15 巻, 6 号
選択された号の論文の7件中1～7を表示しています
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知野 悌二1961 年 15 巻 6 号 p. 368-376
発行日: 1961/06/10
公開日: 2010/02/10
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関根 順吉1961 年 15 巻 6 号 p. 377-380
発行日: 1961/06/10
公開日: 2009/11/17
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III.サルファイト蒸解とクラフト蒸解中におけるヘミセルロースの挙動の差異戸田 久昭, 木島 常明, 浜田 忠平1961 年 15 巻 6 号 p. 381-388
発行日: 1961/06/10
公開日: 2009/11/17
ジャーナル フリーSeveral sulfite and sulfate pulps ranging in yield from about 80 to 47% have been prepared from fir and birch wood chips (Table 2 and 3), and their compositions, caustic soda solubilities and degree of polymerization of hemicellulose have been compared.
1. Since considerable amount of cellulose and mannan (or glucomannan) are removed from sulfate pulps at the beginning of cooking (Fig. 3), the pulps are generally lower in yield compared with sulfite pulps at the equal chlorine number (Fig. 2). Only hardwood sulfate pulps at chlorine number below about 6 are, however, higher in yield than sulfite pulp at the equal chlorine number, because a large amount of xylan remains in sulfate pulp, especially that of hardwood, even with much progress of cooking.
2. Sulfite pulps are usually higher in polysaccharide extracted with caustic soda solution at low concentration, compared with sulfate pulps at the equal unbleached pulp yield (Fig. 4).
3. Degree of polymerization of hemicellulose decreases a little during the sulfate cooking, while much during the sulfite cooking, especially at the beginning of cooking. In sulfite cooking, it reaches about a half even in high yield range such as 70% (Table 4, 5 and Fig. 5).
In a mild sulfite cooking of birch bleached sulfate pulp, degree of polymerization of hemicellulose decreases about 20%, and the resulted pulps are greatly reduced in bursting strength, especially tearing strength, than original pulp, in spite of a little change in other properties, such as pulp yield, degree of polymerization of total carbohydrate, solubility in 5% sodium hydroxide solution, fiber strength and fiber length (Table 8 and Fig. 7).
These results show probably that there are remarkable differences in swellability and strength of a bond between sulfite and sulfate pulps even at higher range of pulp yield.
It has been found, moreover, that degrees of polymerization of hemicelluloses decrease little during the usual bleaching processes of both sulfite and sulfate pulps (Table 7).抄録全体を表示PDF形式でダウンロード (1638K) -
ビニロン紙の製造について大山 茂雄, 松尾 隆吉, 中場 幸郎1961 年 15 巻 6 号 p. 389-393
発行日: 1961/06/10
公開日: 2009/11/17
ジャーナル フリーThe study was made on the next problems which had been in question in manufacturing of Vinylom paper till now.
1) Diameter of Vinylon fiber and PVA fiber.
2) The containing amount of PVA fiber.
3) The softening temperature of PVA fiber in water.
By the experiments which were made assuming that the more both fibers were slender, the more their bonded area would increase and so the various strength of the paper, the next conclusions were obtained
1) The satisfying results were got when the both fibers were more slender.
2) The paper had maximum tensile strength when 1 den. PVA fiber contents were 15%
3) And maximum tearing strength when 10%
Scarcely any difference could be noticed in various strength for practical uses between the Vinylon paper containing PVA fiber with low dissolving temperature and the one containing it with high dissolving temperature, but the former had a less fluffy and a more bright surface than the latter.抄録全体を表示PDF形式でダウンロード (891K) -
片桐 啓三, 久保田 稔, 柏口 正雄1961 年 15 巻 6 号 p. 394-398,409
発行日: 1961/06/10
公開日: 2010/02/10
ジャーナル フリーBy the use of Micro-Interferometer Niodel MI, the features of smoothness for various coated papers are observed. These features seem to closely relate with the visual degrees of smoothness of papers.Samples used are varnished art papers, brushed art papers and east coated papers.抄録全体を表示PDF形式でダウンロード (16551K) -
太田 節三1961 年 15 巻 6 号 p. 399-409
発行日: 1961/06/10
公開日: 2010/02/10
ジャーナル フリーThe texture of paper is a very important matter when it is printed upon. And the texture of paper rgreatly influences the quality of printing.
The reproducibility of printing is influenced by the microscopic roughness of paper. It is possible to determine it rather accurately by using a Bekk's smoothness tester, a roughness tester of stylus type, or a printing quality tester.
Gloss, density, and receptivity of ink are influenced by the texture of microscopic roughness which is the thickness of ink. In addition, the roughness can be determined indirectly by air or oil permeability, and directly by the blue ink wiping test or by using a pneumatic roughness tester (Denso-Aspero-Meter).
The vehicle absorption rate of the paper does not always influence the gloss of the printing. The microscopic roughness determines the gloss of printing if it is in mono-color, however, if the pape ris printed in multi-color pH does determine the gloss of printing.
And crystalization, mottling and chalking have no relation to velosity of the vehicle absorption when paper is printed actually in the pressroom, otherwise they might have a relation when paper is printed experimentally in the laboratory.抄録全体を表示PDF形式でダウンロード (1981K) -
Von Karl Kratzl1961 年 15 巻 6 号 p. 410-418
発行日: 1961/06/10
公開日: 2009/11/17
ジャーナル フリーPDF形式でダウンロード (3431K)
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