巻号一覧
前身誌
18 巻, 10 号
選択された号の論文の5件中1～5を表示しています
- |<
- <
- 1
- >
- >|
-
第1報 グラフトパルプ繊維の性質李 祥奉, 藤井 光雄1964 年 18 巻 10 号 p. 413-420
発行日: 1964年
公開日: 2010/01/22
ジャーナル フリーAcrylamide (AA) and methy methacrylate (MMA) were grafted onto the pulp fiber using ceric salt as catalyst and various properties of these grafted pulp were measured.
The results obtained are as follows :
1) Density of the grafted pulp decreases with increasing degree of grafting and is nearly same as the calculated value.
2) Refractive index of the fiber decreases by grafting and gives considerably higher value than that calculated.
3) Equilibrium moisture content of the pulp increases by AA grafting and decreases by MMA grafting.
4) As the diameter of fiber increases with increasing degree of grafting, the tensile strength of single fiber somewhat increases but that of per unit area decreases.
5) Dyeability of Congo Red onto the pulp decreases slightly by grafting, but in the case of Miketon Scarlet increases remarkably.
6) Grafted polymer is assumed to be formed in the amorphous region of cellulose fiber, because 50% of the PMMA in MMA grafted pulp is obtained when 10% of the cellulose is hydrolyzed and X-ray diffraction curve of the grafted pulp is similar to that of the ungrafted.
Equilibrium moisture content and water retention value of mixed pulp consisted of grafted and untreated pulp are also discussed.抄録全体を表示PDF形式でダウンロード (1116K) -
滝島 豊, 新井 康政1964 年 18 巻 10 号 p. 421-428
発行日: 1964年
公開日: 2009/11/10
ジャーナル フリーWe have studied on sizes of high pressure Mullen type's bursting strength testing machine and qualities of rubber diaphragm that have an effect on measurement errors, and on standard materials to correct o difference between the testing machines.
Obtained results were as follows :
(1) The size of under pressing disk in the commercial testing machines is different and it makes the measurement erroneous. But there is no distinct provision for this size in the Japanese Industrial Standard.
(2) The qualities and sizes of the rubber diaphragm should be indicated after the size of the testing machine is provided precisely, because an expanding pressure of the rubber diaphragm is related to the size of the testing machine.
(3) Use of such a material as soft Al foil having a great elongation to correct the difference between the testing machines will cause more of errors.
(4) Since this testing machine has an intention of measuring the bursting strength of fiberboard, corrugated fiberboard etc., the standard material having the similar elongation has to be used to correct the difference between the testing machines, thereby, the requirement for the quality of the rubber diaphragm will be alleviated.
(5) If a commercial paper as the standard material is cut out long in machine direction with short width, it will conform to the purpose of use.抄録全体を表示PDF形式でダウンロード (1012K) -
ラワン材樹脂の蒸解・漂白工程中の挙動西田 允士, 田中 昌伸, 近藤 民雄1964 年 18 巻 10 号 p. 429-434
発行日: 1964年
公開日: 2009/11/10
ジャーナル フリーLittle difference exists on the resin contents and its chemical compositions of three lauan wood species. Most of the data on pulp resin so far has been obtained by the standard resin analysis experiments and supports the deresination process suggested by the present authors in the previous report.
The importance to pitch formation of a better understanding of the natural components of resin is emphasized, with examples showing the influence on this components of pulping and bleaching processes and the dependence on its composition of cooking conditions.
The use of some thin layer chromatographic techniques developed for plant chemistry, have provided great availabilities in detection of pulp pitch components.
Experimental techniques (ultraviolet light radiation method) which can be used to study pitch troubles for printability of paper are discussed in terms of simplicity of the process and reproducibility of the results. It is pointed out that the technique will determine whether or not resin particles of pulp form pitch fleck on pulp sheet.抄録全体を表示PDF形式でダウンロード (984K) -
第21報 酸による和紙の変質加藤 晴治, 石川 浩1964 年 18 巻 10 号 p. 435-444
発行日: 1964年
公開日: 2009/11/10
ジャーナル フリーWe examined with three kinds of acid solutions, mainly HCl, HNO3 and H2SO4, a change in quality of various hand-made paper when they are steeped into various degree of these solutions for a different hours, thirty seconds, five minutes and ten minutes respectively.
From these examinations we drew out the following four conclusions.
1) The lower limits of acid's density by which hand-made paper enfeebled to it's quality within a thirty seconds were 0.12 mol in case of HCl, 0.15 mol in case of HNO3 and 0.18 mol in case of H2SO4. However, no influence was observed on the quality of papers by the thiner solutions.
2) When steeped into those acids solutions for a five or ten minutes, these papers were enfeebled even by such a thin degree of solutions as about 0.0018 mol of H2SO4, 0.0012 mol of HCl and 0.0015 mol of HNO3.
3) The strength of Mino-like paper to the acid solutions, which was made by mixture of a paper mulberry and a wooden pulp, are compared unfavorably with pure mulberry paper which contains no wooden pulp.
4) Generally speaking, the strength to acid solutions papers made by Manila hemp are superior to any other papers tested.抄録全体を表示PDF形式でダウンロード (1020K) -
田原 弘, 相馬 隆二1964 年 18 巻 10 号 p. 445-450
発行日: 1964年
公開日: 2009/11/10
ジャーナル フリーIn recent years the automatic spots detector and the automatic sorting machine of the paper are becoming a matter of great importance both at home and abroad. Several methods having each ideas were studied and developed, but the machines in operation are very few. It seems these facts are due to the cost and the practical effect. To solve this problem, the Hokuetsu Paper Mfg. Co. tested the equipment installing on machine which was ordered to make to T electronics Co.
As the result of test is good, we report here its practical effect. Moreover it is expected that this automatic spots detector makes a new age in the field of the automatic sorting and the automatic wrapping in future.抄録全体を表示PDF形式でダウンロード (727K)
- |<
- <
- 1
- >
- >|