All issues
Volume 55, Issue 2
Displaying 1-15 of 15 articles from this issue
- |<
- <
- 1
- >
- >|
-
Norihiko Nishimura2001 Volume 55 Issue 2 Pages 155-161,023
Published: February 01, 2001
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSRecent years. some tends in paper production, such as the progress of highly utilization of recycled paper, mill system closure. promotion of light weight, alkaline papermaking, accelerated increase of inkjet printing for communication paper and replacement from internal chemicals to surface sizing are observed. All of those change results in that the surface chemical agents play more and more important role in controlling the quality of paper.
In this paper, properties of surface sizing agents are mentioned. Finally, appropriate surface sizing agents such as for lower foam generate type, newsprint for off-set printing, communication paper to achieve good ink-jet printing are summarized.View full abstractDownload PDF (2038K) -
R. W. Wygant, R. R. Iyer, D. O. Cummings, Akio Okagawa2001 Volume 55 Issue 2 Pages 162-169,023
Published: February 01, 2001
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSDuring the 1990's the paper industry has seen the introduction of what have come to be called engineered pigments.These pigments typically have been modified physically and/or chemically to produce, for example, narrow particle size distributions. A desired result of these pigment modifications is a change to structure of paper coatings. Reductions in fine particle content can lead to larger pores within the coating.These larger pores can enhance optical scatter as well as reduce capillary imbibition forces on fluids presented to the paper surface.
A second generation engineered kaolin paper coating pigment has been developed.This pigment has similar optical performance benefit to first generation engineered kaolin.However, glossing propertiesh ave been significantly enhanced.Some of the benefits are not readily discernible using industry standard measurements.Use of advanced measurement techniques, believed to correlate better with visual perception, show significant and unique improvements.View full abstractDownload PDF (1658K) -
Mitsuo Ishida2001 Volume 55 Issue 2 Pages 170-175,023
Published: February 01, 2001
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSThis Paper presents new modified starch for surface size press, which improves vessel pick trouble on newspaper printing.We solved its problem by developing new type oxidized starch with much aldehyde group, which also improved surface tackiness on offset printing.View full abstractDownload PDF (2180K) -
Nobuhiro Matsuda, Fumihisa Miyajima, Shigeo Yamanaka, Yoshiaki Zama2001 Volume 55 Issue 2 Pages 176-182,024
Published: February 01, 2001
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSWe reported that we developed the air permeability tester with which we could measure the acceleration of the air permeability (AAP) of coated paper under high temperatures and high pressures during a short time.And we found that AAP was more strongly related to the blistering tendency of coated paper.
In this paper, we used various commercial A 2 web offset coated papers, and studied on the blistering resistance.Then we found that the internal bond of coated paper and AAP that had a direction from base paper to coating layer, was strongly related to the blistering tendency.So.the result indicated that the direction of the air permeability from base paper to coating layer was important to understand the blistering phenomenon.View full abstractDownload PDF (1710K) -
Build“Wipe-Out a Defects”System By TECHNOS Active-Sensing3010HYoshiro Yamada2001 Volume 55 Issue 2 Pages 183-187,024
Published: February 01, 2001
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSThe Paper Industry is known of very fast work speed as well as the cold mill in the Steel Industry. Because of very fast work speed, the Paper Industry takes automatic inspection in the first time.The former system need to be set more than10cameras on the production line, therefore, there were many problems of a difference of sensitivity between 2 cameras and handling.Technos Japan Corp.has developed a new system that is able to find a defect of0.33square mm, 10, 000 m every minute by only one camera when the visual width is1, 666mm.Technos Japan Corp.already took a patent for this system in Japan.USA.European countries (Germany.France.England.Switzerland and Austria), and Korea.We explain this system as follows.View full abstractDownload PDF (1565K) -
Toshio Ishida2001 Volume 55 Issue 2 Pages 188-192,025
Published: February 01, 2001
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSA higher alcohol based emulsion type defoamer is widely applied for paper making process because of its small affect on sizing performance, exellent effect on deairation of white water, and its low cost. However, there are some weakness in the present emulsion type product, for example the viscosity of product increase during storage, the occurence of spot is sometimes found in relation to the adhesivecomponent from the defoamer when it stains the paper making system.
This paper gives an outline on the preparation procedure of emulsion type product, and some examples of trouble and shooting.Finally.the auther would like to introduce our new product “KURILESS 230”which was developed to be aimed at eliminating the above weakness.View full abstractDownload PDF (616K) -
Hiroki Matsunaga2001 Volume 55 Issue 2 Pages 193-198,025
Published: February 01, 2001
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSElectric equipment is a pillar of today's industrial operations, and maintaining its stability is one of our important roles.In the past, it was important how quickly we repair the equipment after an accident occurs.However, these days we emphasize how we can avoid accidents.
To avoid a sudden accident.the equipment must be properly checked, therefore, the ability to foresee and prevent accidents is a necessity.
Initially, motors are designed (made) to have a long life span and durability.As well, we can keep a motor operation safety by replacing expendable items such as bearings and luburicating oil or by cleaning it.
However, the insulation capacity of a motor will decline over time because dust in the air sticks to coil, which prevents it from cooling properly and because some of the dust absorbs humidity. In addition, If something prevents the coil from cooling, it will heat up.Generally, it is believed that a coil's life span will be reduced by half for every lot increase in temperature.
As stated above, the insulation capacity of electric motors declines with age, much like the human body.
As for the paper and pulp equipment, checking the rest of motor's life span and resuscitating of its insulation are performed in recent years along with the increase of the demand.
In this article, I will report about how to check the insulation and its known-how as a motor maker, and about an estimation of insulation's brake down voltage, which I refer to a data from repairing and replacing windding coil. I will also inform about a method of the estimation of the rest of life span.Then I will Introduce the technology (the method to prolong life span of winds by vacuum pressurized impregnation by using epoxy resin) to revive the insulation by not changing the winding coil.View full abstractDownload PDF (1988K) -
A. Parén, J. Jäkärä, Manabu Kodama2001 Volume 55 Issue 2 Pages 199-205,026
Published: February 01, 2001
Released on J-STAGE: November 29, 2010
JOURNAL FREE ACCESSThe aim of the present study was to examine the use of GREENOXTM process in bleaching of kraft pulps.
The GREENOXTM process is a method to bleach kraft pulps with molybdate-activated hydrogen peroxide. This process is a delignification method that can be installed in existing bleaching plants without no larger investments required.Circulation of the bleaching filtrates and dissolved organic material and removal of hexene uronic acids as a function of oxidant consumption was examined.
The results indicate that hexene uronic acid groups are effectively removed.The reaction products of molybdate-activated peroxide do not consume hydrogen peroxide significantly when the filtrate is circulated.View full abstractDownload PDF (1540K) -
[in Japanese]2001 Volume 55 Issue 2 Pages 211
Published: February 01, 2001
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSDownload PDF (276K) -
[in Japanese]2001 Volume 55 Issue 2 Pages 214
Published: February 01, 2001
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSDownload PDF (283K) -
The Cross-directional Characteristics of Paper for the Commercial Paper Machine and the Printing ProblemHiroaki Kuno, Makio Hasuike, Setsuo Suzuki, Masakazu Akatsuka, Kazuhit ...2001 Volume 55 Issue 2 Pages 215-225,026
Published: February 01, 2001
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSIt is important to understand how paper is dried and shrunk in a drying process for improvement of the dimensional stability. The cross-directional shrinkage profiles were measured under several restraint forces like vacuum and fabric restraints in the commercial paper machine. The magnitude of shrinkage was affected more significantly by fabric restraint than by vacuum restraint. The cross-directional stretch and hygro-expansion profiles of the dried paper were also measured. These were shown to be non-uniform in the cross machine direction and the highest values were found to occur at the front and back edges. By using paper rolls of newsprint taken from the middle and edge of the paper machines, printing tests by a tower type offset press were conducted and the register error socalled“fan-out”, was evaluated. In the paper from the edge there occurred a higher register error than that in the paper from the middle because of the elongation difference due to water absorption in the printing process. Also, in the paper from the edge, there was found to occur a difference in the register error between the front and the back due to unsymmetrical stability in the cross machine direction.For improvement of non-uniform dimensional stability at the edge, reducing open draw length in the dryer section and reducing evaporation at the edge in the open draw section must be effective.View full abstractDownload PDF (3073K) -
2001 Volume 55 Issue 2 Pages 226
Published: 2001
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSDownload PDF (15K) -
On Supporting Edges and under Uniform Concentration Load of Point or Area range at Plate CenterSatoru Matsushima, Shigeo Matsushima2001 Volume 55 Issue 2 Pages 227-235,027
Published: February 01, 2001
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSAn elastic analysis of stress and deformation was attempted for the anisotropic rectangularplate (Lb=400, Hb=200mm) of the single-wall corrugated fiberboard (SWCF) supported by four edges under uniform concentration load of the point or the area range (rectangle) at the center of the plate. Stress distributions of the rectangular plate obtained by the analysis were discussed, and its characters were done obviously. Obtained results are as follows.
The deflection w concentrates remarkably at the plate center and is zero in their four edges. Also the maximum Wmax of w is at the plate center.Normal stresses σx, σy of the machine and the cross directions (MD and CD) on KL outer surface concentrate sharply at the plate center and are zero in their edges. Also maximums σxmax σymax of their stresses are at the plate center, and w, σx and σy distribute symmetrically for axes x, y through plate center. The shear stress τxy on KL outer surface distributes antisymmetrically for the plate center, and the maximum of|τxy|is near at four positions x=±Lb/4, y=±Hb/4 from the center.View full abstractDownload PDF (1418K) -
Atsushi Ikeda, Toshiharu Enomae, Fumihiko Onabe2001 Volume 55 Issue 2 Pages 236-243,027
Published: February 01, 2001
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSBinder migration that occurs in a drying process for coated paper was studied in the light of interaction between latex and starch. It is well known as binder migration that latex particles and starch concentrate near the top surface of a coating layer as a result of intensive drying. The results showed followings. Latex migration was induced by starch formulated as a co-binder. This inducement increased as amount of formulated starch increased.Dextrin of a degree of polymerization (DP) of about 33induced latex migration to a greater extent than starch phosphate of a DP of a few hundred, but glucose had a much less effect. Starch migration per se had the same tendency regarding DP. Electric charge of starch did not affect latex migration. There was no difference in latex and starch migrations between anionic starch phosphate and nonionic hydroxyl ethyl starch. The peculiarity of starch to inducement of latex migration seems to be related to ease with which starch tends to gel at high temperatures, approaching to high solids. In rapid drying, if the concentrations of latex and starch near the top surface increase and the starch gels.a sudden increase in color viscosity lowered the diffusion velocity of the latex particles and the starch into the bulk. Thus, the whole coatingsolidifies. maintaining their concentrations at the top surface higher than the rest of it. This mechanismwas predicted for latex migration occurring in the presence of starch.View full abstractDownload PDF (2354K) -
2001 Volume 55 Issue 2 Pages 244-245
Published: February 01, 2001
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSDownload PDF (266K)
- |<
- <
- 1
- >
- >|