All issues
Volume 46, Issue 12
Displaying 1-12 of 12 articles from this issue
- |<
- <
- 1
- >
- >|
-
Raysabro OYE1992 Volume 46 Issue 12 Pages 1485-1496
Published: December 01, 1992
Released on J-STAGE: February 09, 2010
JOURNAL FREE ACCESSUtilization of wastepaper has increased its importance from the view points of resources and energy saving, environmental and ecological preservation and reduction of urban garbage.
Trend of wastepaper recycling is reviewed and anticipated, for the recycle is being promoted out of economical background.
Technology and engineering for wastepaper treatment have been significantly improved. For further development some comments are suggested from the fundamental technological view points.View full abstractDownload PDF (4306K) -
Masato Nakajima1992 Volume 46 Issue 12 Pages 1497-1507
Published: December 01, 1992
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSThe technological trend of paper size and paper strengthening agent are reviewed.
Low foaming and smooth machine operation are main feature of new alkali or acid sizing agents. As a illustrative example Sizepine N-773 and N-PPS are discussed.
To cope with the high pH due to the calcium carbonate in recycled paper or to deal with the situation where conventional alkalisize fail, “Neutral Rosin Sizes” are available now. Sizepine NT Series that works well in pH range of 6 to 8 are presented.
With higher recycled paper in the feed the paper strength has been decreasing. Higher productivity in paper mill also necessitates new strengthening agent. The anionic- and cationic-polyacrylamide mixing system (so called mixed-PAM) and a newly developed “Highly Compact and High Molecularweight Chain type” copolymer paper strengthening agent are discussed in term of their practical application.View full abstractDownload PDF (1635K) -
Takayoshi Higuchi1992 Volume 46 Issue 12 Pages 1508-1511
Published: December 01, 1992
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSDownload PDF (5805K) -
Tokue Iwatsu1992 Volume 46 Issue 12 Pages 1512-1532
Published: December 01, 1992
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSSome 150 experts of the packaging industry from most of the Asian and Oceanian countries gathered together to discuss “Opportunity of Growth” in this region.
Enthusiasm for better life, yearning for new technology and concern about environment pervaded the congress hall throughout the session.
The author was given an opportunity to address the participants under the title of “Quality and Technology”, focusing on small group activity for developing nations but emphasizing on R&D for developed countries.View full abstractDownload PDF (9652K) -
Takeshi Kanazawa1992 Volume 46 Issue 12 Pages 1533-1561
Published: December 01, 1992
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSForeign substances not only reduce productivity by causing paper-sheet break and equipment contamination at paper machine, finishing equipment and printing machine, but also deteriorate the product quality appearance, thus create a great deal of profit loss in paper industries.
Especially in recent year, with the increasing hot-melts, adhesive tape and plastic materials in the furnish, it is strongly demanded, worldwide, to improve the contaminants removal as one of the biggest problems in paper industries. This paper describes the current technology for the contaminants removal and the related facilities of Aikawa.View full abstractDownload PDF (4880K) -
Gyosuke Meshitsuka1992 Volume 46 Issue 12 Pages 1562-1566
Published: December 01, 1992
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSDownload PDF (882K) -
[in Japanese]1992 Volume 46 Issue 12 Pages 1567-1570
Published: December 01, 1992
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESS -
1992 Volume 46 Issue 12 Pages 1571-1579
Published: December 01, 1992
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSDownload PDF (10510K) -
[in Japanese]1992 Volume 46 Issue 12 Pages 1580
Published: December 01, 1992
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSDownload PDF (174K) -
The relation between JPRI method and the othersKaoru Hieta, Hiroki Nanko, Masanori Arie, Junji Ohsawa1992 Volume 46 Issue 12 Pages 1581-1589
Published: December 01, 1992
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSIn our first paper, it was indicated the JPRI method can evaluate bonding ability of pulp fibers by the two indexes : “conformability index” and “bond strength index”. In this paper, the relationship between JPRI method and other evaluation methods of pulp fibers were investigated.
Conformability index of unbeaten pulp corresponded to the evaluation of coarseness of pulp fibers with the ratios of wood fiber cross-sectional dimension. Conformability index had a good correlation to density, specific scattering coefficient and relative bonded area of handsheet. These suggest that the index can evaluate the total effect of fiber shape, reflect the packing effect of fibers as density does, and has close relation to the bonded area in a handsheet. Bond strength index was compared with the bond strength values of earlier presented methods. The index was a little lower than the shear strength values obtained using the single fiber crossing, fiber-shive bonding and fiber-cellophane bonding.
Z-tensile strength of paper-cellophane sheet which depends on both bonded area and bond strength per unit bonded area had a good correlation to burst index, breaking length and MIT double folds of handsheet. The Cowan's bonding index correlated with the paper-cellophane Z-tensile strength.View full abstractDownload PDF (1323K) -
Kyoji Suzuki, Mikiaki Takahashi, Takeo Ueno, Takatoshi Koyakumaru1992 Volume 46 Issue 12 Pages 1590-1598
Published: December 01, 1992
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSEffect of gamma-irradiation on the strength properties of various paperboards and corrugated fiberboards with different grades and effect of recycling on those irradiated sheets were investigated.
Results obtained are summarized as follows :
1) Postradiational changes in the strength properties of AA-, A- and C-grade linerboards showed approximately same tendency.
2) After 25 kGy irradiation (usual sterilizing dosage), AA- and A-grade liner boards reduced the ranking to A- and B-grade respectively, however, C-grade liner and A-grade medium remained in each grade.
3) Corrugated fiberboard composed of AA-liner and A-medium remained the rank of S-4 (JIS Z 1516) even after 25 kGy irradiation. Corrugated fiberboard composed of A-liner and A -medium also remained the rank of S-3 after 25 kGy irradiation.
4) Canadian standard freeness of recycled stock from the irradiated samples decreased with increasing dosage, and the increase of short fiber fractions by the irradiation was observed.
5) The strength properties of handsheets recycled from the irradiated samples were lower than those from unirradiated samples except the wet tensile strength. Lowering degree of the strength properties was given in the following order :
Folding endurance>Tearing>Bursting>Dry tensile.View full abstractDownload PDF (1194K) -
1992 Volume 46 Issue 12 Pages 1599-1606
Published: December 01, 1992
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSDownload PDF (1424K)
- |<
- <
- 1
- >
- >|