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47 巻, 9 号
選択された号の論文の13件中1～13を表示しています
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二次木部の形成のしくみと制御久保 隆文1993 年 47 巻 9 号 p. 1051-1060
発行日: 1993/09/01
公開日: 2010/10/27
ジャーナル フリーYoung stem of a rapid-growth tree is largely occupied with juvenile wood, in which secondary xylem is composed of tracheids or wood fibers with shorter length, narrower diameter and thinner wall. Also, in the juvenile wood, chemical composition of the cell wall is relatively rich in lignin, but is more poor in cellulose. The lower quality of juvenile wood evaluated as a material for pulp and paper may be improved by means of new biotechnology for tree breeding.抄録全体を表示PDF形式でダウンロード (3319K) -
近藤 唯弘1993 年 47 巻 9 号 p. 1061-1064
発行日: 1993/09/01
公開日: 2010/10/27
ジャーナル フリーPDF形式でダウンロード (1303K) -
成長は続くか大河原 康博1993 年 47 巻 9 号 p. 1065-1071
発行日: 1993/09/01
公開日: 2010/10/27
ジャーナル フリーPDF形式でダウンロード (1133K) -
セス ラージンデール, ロバートソン ゴードン, ホフマン ジョン, マイ ユーウイング1993 年 47 巻 9 号 p. 1072-1079
発行日: 1993/09/01
公開日: 2010/11/29
ジャーナル フリーFracture toughness is a material's ability to resist crack propagation. In most end uses where fracture toughness can be an important service parameter for paper, stresses are applied in the plane of the sheet. Elmendorf or Brecht-Imset tear tests do not measure a plane stress fracture toughness, as the tearing forces are applied out of the sheet's plane. Methods currently available for plane stress measurements on tough papers are either inappropriate or are tedious and inaccurate. A method which is simple, practical and amenable to laboratory-size specimens has been explored. It is based on the “essential work of plane stress ductile fracture” concept developed by Cotterell and Mai. The method has been successfully applied previously to metallic and polymeric sheet materials, and the results, which are independent of the specimen geometry, have been identified with the fracture toughness Jc or R of the material. With measurements on a variety of samples, we demonstrate that the method is applicable to paper.抄録全体を表示PDF形式でダウンロード (1765K) -
その導入ウー ヤンD.1993 年 47 巻 9 号 p. 1080-1086
発行日: 1993/09/01
公開日: 2010/11/29
ジャーナル フリーOne of the key technological events of the 1980's in papermaking was the development and implementation of the soft nip calendering, on or off-line, The technology found many applications and is gaining acceptance around the world. When some of the present technical problems are resolved, it may become a standard feature of all paper machines.
As the CD profile control technology continues to improve, the primary role of the calender has been shifting from the traditional reel building tool to that of surface finishing. During the second half of the 1980's, we examined the technology for various paper and paperboard operations. In this paper, I would like to share with you some of our findings from pilot trials and laboratory evaluations.
High temperature soft nip calender (HTSNC) has a nip that is hot, long and of low specific pressure. It works primarily on the small scale roughness of the paper surface. This may or may not be of practical value depending on the paper grades and their end-use requirements. Benefits from new technology can never be scrutinized too much.抄録全体を表示PDF形式でダウンロード (972K) -
各種ポリマーによるTMP処理の最適化ウインター L., ローレンチャック P., ロルツ R.1993 年 47 巻 9 号 p. 1087-1093
発行日: 1993/09/01
公開日: 2010/11/29
ジャーナル フリーThis paper illustrates new experience with efficient polymer applications to control pitch problems. Part of the solution is the development of a new laser-optical method for counting the pitch particles in filtrate of paper stock. Using this method pitch particles are shown to be reduced by additions of cationic polymers. By measuring cationic demand this is found to be due to a neutralization of the anionic charge of the pitch particles. This demonstrates a possibility to separately control the negative influence from pitch particles upon wet end chemistry.抄録全体を表示PDF形式でダウンロード (1107K) -
松井 義雄1993 年 47 巻 9 号 p. 1094-1099
発行日: 1993/09/01
公開日: 2010/10/27
ジャーナル フリーソーダ回収ボイラー排ガス中の大一量の微粒子が原因で空間電化現象 (コロナ抑制) が生じると電気集じん装置出口ダスト排出濃度が増えることがある。この場合は整流器の制御システムの改善により, 出口ダスト濃度を大幅に低下することができる。また, 放電線の形状を変えると出口ダスト濃度を更に低くできる。
集じん装置内にダスト堆積が生じると集じん性能を低下させる。堆積原因はダストがガス状のSO2/SO3と反応することにある。この場合には槌打装置の槌打ち力が重要なポイントとなる。
プロセスの運転条件以外の理由, 例えば集じん装置の機械的, または電気的状態が悪いことが理由で出口ダスト濃度が増加する場合は, 制御システムの改善や放電線の形状を変更する前に, まず機械と電気の不良箇所を修理, 調整する必要がある。抄録全体を表示PDF形式でダウンロード (2622K) -
塩見 敏雄, 矢田 昌己, 八木 通正1993 年 47 巻 9 号 p. 1100-1112
発行日: 1993/09/01
公開日: 2010/10/27
ジャーナル フリーIn pulp and paper plants, the chemical recovery boiler plays the role of not only a chemical reactor, but the most important energy supply source. Through the oil crysis of the 1970's, the value of energy from a recovery boiler has risen much more, and an effort for its maximal use has been made intensively.
On the other hand, the needs for minimal air pollutant emissions and plugging-free long term continuous operation of recovery boilers have been increasing.
This paper illustrates the history and design features of Mitsubishi Chemical Recovery Boiler, which has been developed in answer to the above mentioned requirements.抄録全体を表示PDF形式でダウンロード (3796K) -
大昭和製紙 (株) 岩沼工場1993 年 47 巻 9 号 p. 1113-1118
発行日: 1993/09/01
公開日: 2010/10/27
ジャーナル フリーPDF形式でダウンロード (2011K) -
山田 卓良1993 年 47 巻 9 号 p. 1119
発行日: 1993/09/01
公開日: 2010/10/27
ジャーナル フリーPDF形式でダウンロード (239K) -
対比較法による官能検査内藤 勉, 大澤 純二1993 年 47 巻 9 号 p. 1120-1130
発行日: 1993/09/01
公開日: 2010/10/27
ジャーナル フリーThough many commercial sheet formation testers have been designed with high technologies as has been discussed in a previous paper of this study, they have not come into wide use in Japan. One of the possible reasons for this is a paper maker's distrust as to the testers corresponding with his subjective evaluation. To clear up his doubt, a quantitative determination of his subjective evaluation for comparison with results by the testers would be required, but few reports have been published on the subjective test of the sheet formation. For these reasons, the present work deals with a subjective test of sheet formation with light transmission for the samples used in the previous paper, which were studied using a paired comparison method and analyzed by the Scheffe's method.
One hundred eighty three panelists, including eight paper making companies, three printing companies, two xerography makers, four wholesale dealers, two book publishers, two official institutes and two universities in Japan have collaborated with this work. The results on the consistency test for the paired comparison data by the circular triad method showed that 90 percent of the panelists had a judgment ability to evaluate sheet formation and the subjective sheet formation might be concerned as one dimensional scale. The variance analysis for the paired comparison data by Scheffe's method led to a conclusion the main effect of the Scheffe's model (sensory value of sheet formation) might not be influenced by an individual preference and combinations of the samples. Being on the market as a same product grade, the samples had a wide range of sheet formation as sensory value. Since the sensory value of sheet formation for each sample was determined quantitatively, a comparison of these results on the subjective test with sheet formation testers would be available.抄録全体を表示PDF形式でダウンロード (1497K) -
山内 龍男, 村上 浩二1993 年 47 巻 9 号 p. 1131-1135
発行日: 1993/09/01
公開日: 2010/10/27
ジャーナル フリーAcoustic emission (AE) and optical reflectance measurements were simultaneously carried out to investigate the deforming process of paper materials. Significant differencein the AE and the optical reflectance behavior during straining suggested that the increase in the optical reflectance under tensile deformation could be caused by the separation of the optical contact of fibers. The structural change derived from the separation of optical contact between fibers gradually occurs with increasing irreversible elongation. On the other hand, the structural change mainly derived from the breakage of fiber-to-fiber bonds exponentially occurs with increasing sheet elongation. Although beating and wet pressing caused the increase of the optical contact, some of the increased optical contact would not be separated under tensile deformation, especially the increased optical contact by lightly beating resisted to be separated under tensile deformation抄録全体を表示PDF形式でダウンロード (745K) -
多田 友紀, 山根 誠, 坂本 守1993 年 47 巻 9 号 p. 1154-1160
発行日: 1993/09/01
公開日: 2010/10/27
ジャーナル フリーPDF形式でダウンロード (1180K)
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