巻号一覧
前身誌
33 巻, 12 号
選択された号の論文の8件中1～8を表示しています
- |<
- <
- 1
- >
- >|
-
P.P.R.I.C.留学記竹山 三郎1979 年 33 巻 12 号 p. 742-749
発行日: 1979/12/01
公開日: 2009/11/10
ジャーナル フリーPDF形式でダウンロード (7087K) -
紙パルプ技術協会 編集委員会1979 年 33 巻 12 号 p. 750-767
発行日: 1979/12/01
公開日: 2010/01/22
ジャーナル フリーPDF形式でダウンロード (14468K) -
日本紙業 (株) 芸防工場日本紙業株式会社1979 年 33 巻 12 号 p. 768-780
発行日: 1979/12/01
公開日: 2010/01/22
ジャーナル フリーPDF形式でダウンロード (16888K) -
1979 年 33 巻 12 号 p. 781
発行日: 1979/12/01
公開日: 2009/11/10
ジャーナル フリーPDF形式でダウンロード (174K) -
前照射におけるアルコール添加の効果, リグニンの研究 第102報稲葉 政満, 飯塚 尭介, 中野 準三1979 年 33 巻 12 号 p. 782-786
発行日: 1979/12/01
公開日: 2009/11/10
ジャーナル フリーStudies have been made of kraft cooking of gamma irradiated wood. Beech (Fagus crenata Blume) wood meal suspended in aqueous alkaline alcohol was irradiated up to 1.5 KGy (0.15 Mrad) with gamma rays from a Co-60 source in the presence or absence of oxygen. The irradiated wood meals were washed thoroughly with fresh water, air dried and cooked under the ordinary cooking conditions.
The results are summarized as follows :
(1) Pre-irradiation in aqueous alkali have negligible effect on kraft cooking.
(2) In the case of ethanol addition (50 g/l), pre-irradiation in vacuo shows acceleration of delignification and stabilization of carbohydrates during kraft cooking. Cooked yield gain by pre-irradiation was about 1.2% in all over the range of delignification from 80 to 90%. Aqueous ethanol without alkali also shows positive but smaller effect than that with alkali.
(3) Propanol, iso-propanol and butanol show positive but smaller effects than ethanol. However, methanol does not show any positive effect.
(4) Irradiation in the presence of oxygen does not show any attractive effect on kraft cooking.抄録全体を表示PDF形式でダウンロード (781K) -
「紙の伸縮安定性に関する研究」第8報木島 常明, 山川 功, 新居 秀彦1979 年 33 巻 12 号 p. 787-795
発行日: 1979/12/01
公開日: 2009/11/10
ジャーナル フリーIt has been well known that dimensional changes of paper are decreased by restraint during drying of the paper. In the case of paper dried under tension, the number of fiber-fiber contact is less than in the case of paper dried without tension. It is considered that stress to the dried sheet has the same effect on the sheet as restraint during drying of wet sheet. In this paper, we discuss the effect of stress to the dried sheet on dimensional stability of paper. The results obtained are summarized below.
1. Stress-strain curves of the papers dried with and without tension were very different, however, stress relaxations of these papers were similar.
2. Moist-expansivity of the papers decreased when they were stressed, because interfiber contacts in the paper were decreased by stress. They were further decreased when the paper was further strained (permanent set).
3. The light scattering coefficient of the paper increased when it was stressed. However, when the stressed paper was conditioned in various humidity cycling, the light scattering coefficient of the paper decreased gradually. It seemed to return to the coefficient before stress.
4. As paper dried under tension, stressed paper gradually shrunk with humidity cycling, and moist-expansivity of this paper increased under these conditions. In other words, the papers in states of restraint have the tendency to become more stable by humidity cycling.
5. Papers were more strained in high humidity than in low humidity, but there was no difference in relationship between light scattering coefficient and moist-expansivity for both papers which strained in high and low humidity.
6. The curling of the papers could be changed by stress. However, this curling was also easily affected by humidity cycling.抄録全体を表示PDF形式でダウンロード (1525K) -
わらのSOXパルプ, パルプ廃液の完全処理と利用に関する研究 (V)御田 昭雄, 稲田 治, 浜松 和隆, 堀内 悟, 山本 登久男, 勝地 光雄, 山崎 恒夫, 勝山 敦弘, 赤羽 利昭, 梅木 一義, 平 ...1979 年 33 巻 12 号 p. 796-805
発行日: 1979/12/01
公開日: 2009/11/10
ジャーナル フリーHigh yield pulp prepared from rice straw by SOX process was studied.
Rice straw contained 2.6% alcohol benzene soluble, 16.1% hot water soluble, 46.6% of 1% sodium hydroxide aq, sol. soluble, 27.1% of 1% hydrochloric acid aq. sol. soluble, 51.1% holocellulose, 37.3% α-cellulose, 20.0% pentosan, and 13.1% lignin.
Rice straw were lightly heated in aqaous acidic solution of sodium sulphate and sulphur dioxide (liquor ratio 10 l/kg, as Na2O 60 g/l, SO2 O 60 g/l, 105145°C, 1 hr) and then mechanically treated with a single disk refiner.
Rice straw SOX pulp (SOXP) is comparatively tough in spite of high yield (4774%) SOX 221 (yield 74.1%) gave higher yield and stronger pulp than RMP (yield 62.0%).
SOX 223 (yield 59.7%) gave 19.7% ash, 13.7% pentosan, and Kappa number of 85.7.
Hand sheets prepared from SOXP by Tappi standard method (CSF 330 ml) showed 3.29 km breaking length, 1.55 burst factor, 33.0 tear factor, 13.9 kg strength in ring crush test.
Yield and components of SOXP was varied by cooking condition and concentration of sulphur dioxide and sodium sulphate in cooking liquor.
The yield decreased by sulphur dioxide concentration, and increased by decreasing of sodium sulphate concentration.
Ash content of SOXP was very high (1122%), and c.a. 98% of ash was silica. Ash content increased by decreasing of sulphur dioxide and decreased by increasing of sodium sulphate concentration in cooking liquor. Pentsan content (523%) of SOXP increased by decreasing of sodium sulphate, and decreased by increasing of sulphur dioxide concentration in cooking liquor. Kappa number of (6191) of SOXP decreased by increasing of sulphur dioxide.抄録全体を表示PDF形式でダウンロード (6986K) -
1979 年 33 巻 12 号 p. Preface10-Preface12
発行日: 1979/12/01
公開日: 2009/11/10
ジャーナル フリーPDF形式でダウンロード (371K)
- |<
- <
- 1
- >
- >|