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Volume 48, Issue 12
Displaying 1-14 of 14 articles from this issue
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Japan TAPPI1994 Volume 48 Issue 12 Pages 1529-1544
Published: December 01, 1994
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSThe working group called “What we should do for future Japan TAPPI ?” started its work on August, 1993 and presented its report to the Japan TAPPI board meeting on September 19, 1994. The proposal was approved there and it will be a guideline for future activity.View full abstractDownload PDF (1420K) -
Japan TAPPI1994 Volume 48 Issue 12 Pages 1545-1563
Published: December 01, 1994
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSDownload PDF (1836K) -
Akira Takahashi1994 Volume 48 Issue 12 Pages 1564-1575
Published: December 01, 1994
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSThe energy consumption and energy saving of the pulp and paper industry in 1993 are reviewed.View full abstractDownload PDF (1019K) -
Joerg Fischer, Arbrecht Meinecke1994 Volume 48 Issue 12 Pages 1576-1579
Published: December 01, 1994
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSThe equipment which produces three-ply woodfree paper can be installed nowadays by using the established technical methods. This concept is significant only when the printability of outer plies is better than that of inner ply and the cost of material for inner ply is obviously cheaper than that for outer plies.View full abstractDownload PDF (530K) -
Makoto Miyake1994 Volume 48 Issue 12 Pages 1580-1588
Published: December 01, 1994
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSWe started the preparation for obtaining ISO 9002 Resistration by Kanzaki Mill in December 1992 and succeeded it in June 1994.
Following are our experiences to be successful in obtaining ISO 9002 Resistration.View full abstractDownload PDF (1118K) -
“Down Sizing” DCS[in Japanese]1994 Volume 48 Issue 12 Pages 1589-1596
Published: December 01, 1994
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSThis serial report describes current topics in pulp and paper process instrumentation technology, and this paper focuses on the “down sizing” DCS.View full abstractDownload PDF (1057K) -
Hideo Ikezawa, Tomotsugu Miyosi, Sinobu Watanabe1994 Volume 48 Issue 12 Pages 1597-1602
Published: December 01, 1994
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSNew Oji Paper Co., Ltd. has developed a new spunlace nonwoven “TEXCELL”. TEXCELL is made from pulp and synthetic filaments by the hydroentanglement technique. The major characteristics of TEXCELL are softness, low density and high strength. It maintains high tensile strength even in wet condition. TEXCELL can hold large amounts of oil and water and absorption speeds of oil and water by TEXCELL are extremely fast. The degree of the entanglement of pulp and filaments is highly related to the energy of columnar streams of water, applied to pulp and filaments. If the applied energy is too low, the entanglement of pulp and filaments is not strong enough to use as a product. On the contrary, if the energy is too high, sheet formation becomes unacceptable. It is important to choose a suitable energy range for both the entanglement and the sheet formation in order to obtain high quality sheet.View full abstractDownload PDF (733K) -
Enviromental Committee1994 Volume 48 Issue 12 Pages 1603-1606
Published: December 01, 1994
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSDownload PDF (11934K) -
1994 Volume 48 Issue 12 Pages 1607-1612
Published: December 01, 1994
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSDownload PDF (12996K) -
[in Japanese]1994 Volume 48 Issue 12 Pages 1613
Published: December 01, 1994
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSDownload PDF (176K) -
The behavior of organic anionic trash in papermaking system determined by Pyrolysis-Gas ChromatograpyhHiroshi Ono, Takanori Miyanishi1994 Volume 48 Issue 12 Pages 1614-1620
Published: December 01, 1994
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSAs for the technology of producing groundwood-containing papers under alkaline conditions, the main attention now as in the past is focused on interfering substances from groundwood pulp. The terminology “acid to alkaline” itself indicates that chemistry is a primary issue. In general, due to the accumulation tendency of organic anionic trash toward pH increase in the papermaking system, these substances have more detrimental effects on runnability and paper property at alkaline than acid pH.
A knowledge of organic anionic trash in paper and papermaking system is of great interest for the paper industry. But current techniques for the determination of fatty and resin acids in pulp and paper matrices are time-consuming and not so precise as are expected. So, in this experiment, we determined the amount of organic anionic trash in paper by pyrolysis-gas chromatography (Py-GC).
Following experimental results were obtained ;
(1) Organic anionic trash from bleached groundwood pulp was detected mainly as methyl oleate and methyl dehydroabietate by Py-GC at the pyrolysis temperature of 450°C by the use of tetramethylammonium hydroxide as a methylating reagent,
(2) Organic anionic trash retained in paper was determined from the peak intensity of methyl dehydroabietate in the pyrogram.
(3) Since the main components of the resin acids in bleached groundwood pulp are different from those of rosin sizes added at wet end, the amounts of both resin acids from the two origins could be simultaneously determined by Py-GC.View full abstractDownload PDF (741K) -
Hideki Shibazaki, Shigenori Kuga, Fumihiko Onabe1994 Volume 48 Issue 12 Pages 1621-1630
Published: December 01, 1994
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSHandsheets containing hardwood kraft pulp (LBKP) and either bacterial or algal cellulose were prepared, and their mechanical and optical properties were studied in terms of their reinforcing effects on fiber network in sheet. Bacterial and algal celluloses were disintegrated to form a fine fiber suspension, and were added to paper stock in place of LBKP with 0-100%. The reinforcing effect of bacterial cellulose in LBKP sheet resulted in increases of physical properties such as Young's modulus, tensile strength, folding endurance and dimensional stability, although opacity decreased with bacterial cellulose content in handsheet. Handsheets containing algal cellulose had almost no improvement in tensile strength and folding endurance, although they showed improved dimensional stability and high Young's modulus. The difference in physical behavior between bacterial and algal celluloses, in spite of similar structure of fine fibrils, can be explained by the morphological difference between them. The microfibrils of algal cellulose seemed stiff and straight, while those of bacterial cellulose showed flexible, twisting ribbon-like form. Therefore, bacterial cellulose microfibrils are more likely to entangle with LBKP fibers than those of algal cellulose in handsheets, and thus they may contribute to improvements in the mechanical properties.View full abstractDownload PDF (4928K) -
Part 5 Deresination by Akamatsu pine wood extractivesZensaku Abe1994 Volume 48 Issue 12 Pages 1631-1637
Published: December 01, 1994
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSIn order to obtain a better understanding of deresinating compounds in Akamatsu (Pinus densiflora) pine wood extractives during kraft pulping, the effects of additives on the deresination of Sugi (Cryptomeria japonica) and Sudajii (Castanopsis cuspidata) wood chips during pulping and washing were investigated. The chemical additives used were as follows : methanol extractives of Akamatsu pine wood, four kind of surfactants (oleic acid, abietic acid, sodium laurylbenzenesulfonate, and polyoxyethylene (20) sorbitan monooleate) as reference compounds.
The solubilization of lipophilic dye (p-dimethyl-aminoazobenzene) by these chemical additives was also examined and the amount of dye solubilized was measured.
Concerning the deresinating compounds in pine wood extractives, the following results were obtained :
(1) There are some deresinating compounds in the methanol extractives of Akamatsu pine wood.
(2) The effectiveness of abietic acid for deresination during pulping was very low.
(3) The ethyl acetate-soluble materials of the methanol extractives of Akamatsu wood were separated into six fractions (fr.1-fr.6). Fraction 5 is neutrals and soluble in 4% NaOH aqueous solution at hexane/4% NaOH extraction. The deresination effectiveness of fr.5 was the highest in the additives studied here.
(4) In the dye solubilization examination, oleic acid was most effective at a solubilization temperature below 80°C.
(5) At 90°C, the amount of dye solubilized by Fraction 5 exceeded that of oleic acid.
(6) Some effective deresinating compounds may exist in Fraction 5 of the methanol extractives from Akamatsu pine wood.View full abstractDownload PDF (805K) -
[in Japanese], [in Japanese]1994 Volume 48 Issue 12 Pages 1638-1643
Published: December 01, 1994
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSDownload PDF (1114K)
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