All issues
Volume 52, Issue 2
Displaying 1-16 of 16 articles from this issue
- |<
- <
- 1
- >
- >|
-
In-situ Type Concentration Monitor Measuring Concentration in the Coating LineTetsuya Suzuki1998 Volume 52 Issue 2 Pages 159-165
Published: February 01, 1998
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSIn order to automatically control the concentration of coating line for coating paper, eliminate unevenness and stabilize the operation, it is most important to diagnose the state of process and improve the facilities and operation condition to keep them in the best condition.
APPEARANCE MONITOR (in-situ type concentration monitor) is installed in the process as the tool for the diagnosis of concentration measurement and its automatic control.
However APPEARANCE MONITOR sometimes couldn't be used effectively, because proper diagnoses haven't been done.
Some problems exist :
·where in the line the monitor is to be installed
·where the sample for analysis is to be taken
·who takes the sample and analyzes
·how the sample is to be taken the sample
·speed and pressure of running fluid
·bubbles
·etc
This time we will show you how we have solved such problems and what data we've got after solving these problems.View full abstractDownload PDF (925K) -
New Concept for Coating DryingKirio Okamoto1998 Volume 52 Issue 2 Pages 166-170
Published: February 01, 1998
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSUneven binder migration in coating layer and mottle are caused by the temperature, moisture and steam pressure gradients in the paper during drying process.
The solution is IRT Webmate Combi, as it equalizes z-directional gradients during drying. The revolutional IRT Webmate Combi techniqe is based on active Counter Radiator principle-short wabe radiation that penetrates the web is applied to the base paper, and medium wabe radiation from the Counter Radiator is absorbed by the coating layer.View full abstractDownload PDF (622K) -
Yoshiharu Shimokawa, Osamu Ishizu, Takahiro Shimazoe, Yoshio Tamura, K ...1998 Volume 52 Issue 2 Pages 171-176
Published: February 01, 1998
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSHSP's have been used worldwide since more than a decade. Their growth in the paper and board coating is increasing ever since, indicating their popularity. HSP's are used about 4 million tons of paper and board produced worldwide in 1997. Japan is not exception. HSP's are gaining the popularity there. It is expected to expand their applications more such as to bi-toko area etc. with utilizing HSP's unique properties.
In this report, a novel HSP (HP-1055) have high opacity and sheet gloss which is discussed of application for bi-toko.View full abstractDownload PDF (600K) -
Goro Kuwamura, Saburo Hayano, Koji Takano, Kazunori Kamada, Toshiharu ...1998 Volume 52 Issue 2 Pages 177-183
Published: February 01, 1998
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSEffects of the physical and chemical properties of coated layer on the development of print gloss were investigated. Smoothness of an inked surface, which may be greatly affected by ink-set speed, was observed to be closely related to print gloss.
According to our present study, the contact angle betwen latex polymer film and ink solvent examined through the two-liquid method, as one of the factors which should play an important role in determining the properties of ink absorption by coated layer, was found to be an excellent measure of the development of print gloss, and also that of sheet gloss in addition.
The mechanism of the development of print gloss and sheet gloss will be discussed with respect to the contact angle mentioned above.View full abstractDownload PDF (699K) -
Mechanism and Performance of AZCYoshiki Mabuchi1998 Volume 52 Issue 2 Pages 184-191
Published: February 01, 1998
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSAmmonium Zirconium Carbonate (AZC) is well known as an effective insolubilizer for paper coating with its fast curing and easy handling. Its basic reactivity of AZC with functional groups such as carboxyl and hydroxyl group develops wider application in papermaking and coating. We would like to review mechanism and applications of AZC in paper industry in this paper.View full abstractDownload PDF (679K) -
Under-Coating and Printgloss of Double-coated PaperYoshihiko Hattori, Kenichi Yamazaki1998 Volume 52 Issue 2 Pages 192-197
Published: February 01, 1998
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSUnder-coating and its effect on the printability of double-coated paper were studied. Five under-coated papers which were designed to have different coating structures were prepared and coated with same top-color. The printabilities such as inkset and printgloss of these double-coated papers were evaluated. The structures of under-coatings were analyzed and relation between the structure of under-coating and the printability of double-coated paper was discussed.View full abstractDownload PDF (535K) -
Jumbo Roll WindingKei Iwanaga1998 Volume 52 Issue 2 Pages 198-203
Published: February 01, 1998
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSThe increasing size of rotogravure rolls, coupled with the evolution of paper grades and paper making processes, demands Jumbo Roll Winding and minimizing manual works with multistation winders. Based on the demands, minimizing manual increasing and operation productivity, Valmet developed and present a completely new multistation winder called “WINROLL”.
There are many manual works such as “splice at unwinding stand”, “web threading”, “core handling” and “tail fastening” of the former single drum winder. These manual works are minimized in “WINROLL” winder, thanks to fully automated functions, which make one-man operation possible. The winding capacity is the same as in two drum winder by shortening the auto set change time.
The “WINROLL” winder is able to produce 10-tonne or 4-meter width rolls by adding a totally new and sophisticated sequence to any of today's rider roll movement.
In this report, we especially shows the automatic equipment of the “WINROLL” winder. This helps to establish solution for man power problem.View full abstractDownload PDF (910K) -
OptiLoadHidehiko Yamazaki1998 Volume 52 Issue 2 Pages 204-213
Published: February 01, 1998
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSFor the calendering system, soft nip calender and supercalender have been used to attain required surface qualities of various grades of paper. Polymer rolls have been developed for soft nip calenders. In the supercalender technology some developments have been seen such as application of zone-controlled rolls, overhanging load compensation, zoned steam shower, replacement of cotton filled rolls by polymer rolls and so forth. In both calendering systems there are respective benefits and shortcomings even today.
A lot of challenging works have been done in order to design and produce more effective calender. As the results, now we, Valmet can supply new generation multinip calender-OptiLoad for customers after experiencing the various steps of improvements of multinip calenders.View full abstractDownload PDF (4031K) -
Introduction of Automatic Disc Type Insect FilterJunichi Nawata1998 Volume 52 Issue 2 Pages 214-218
Published: February 01, 1998
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSTo keep the air pressure of production room positive greatly contributes to protect insects from coming into the room. However, introduction of great deal outdoor air needs higher costs for air filter installation as well as for operational and/or maintenance.
This system is the solution of above problem, by possibly being applied to the domestic consuming paper plants, with the use of automatic insects evacuation style rotary disc filter together with outdoor air intake fans, aiming at the insect protection by the pressurized room air in economical way.View full abstractDownload PDF (1577K) -
Setsuo Suzuki1998 Volume 52 Issue 2 Pages 219-224
Published: February 01, 1998
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSThe trend of machine speed in today's paper making field has been reaching to 1, 800 m/min for newsprint and 1, 500 m/min for fine paper. Some machines have over 10 m width. High quality has also been required. Each supplier of paper making machine has been introducing new technology for each part as the consistency profiling system for a headbox and/or the center wind assist for a reel. High speed modern paper machinery concept for fine paper and for newsprint are described in this paper.View full abstractDownload PDF (579K) -
Karl Dieter Fuchs, Peter Lang1998 Volume 52 Issue 2 Pages 225-231
Published: February 01, 1998
Released on J-STAGE: April 23, 2010
JOURNAL FREE ACCESSModern principles of sheet-forming systems like Hybrid Formers and Gap Formers could be realized only because new components and materials with specific properties are available today.
With the examples of a dewatering and forming shoe with curved formation length and a two slotted felt suction cover, the selection criterious necessary for ceramic covers in modern Paper Machines will be explained.
When producing Fine Papers with heavy filler load the wear resistancy of modern ceramic materials can be an even more important selection criterion than the heat resistancy factor.
Studying the Tribosystem involving the factors fabric, ceramic cover and fillers more closely, we find the fabric wear and the drive load consumption of a sheet former mainly determined by the filler and the ceramic material in use.
When using filler materials, considered from a mineralogical point of view, consisting of hard and adrasive substances like ground calcium carbonate, fabric and cover wear is determined by the abrasiveness of the filler material and the surface characteristic of the ceramic material.
We can prove, that fabric and cover wear are determined more by the particle size and particle size distribution than by the quantity of fillers in use. The percentage of pores, the diameter of pores and the pore distribution in the caramic cover's suface play a dominating role in the wearing mechanism, too.
With ceramic cover materials it is now possible to measure the surface porosity with an interactive picture analysis system. This makes it possible to give exact statements about pore nombers, pore sizes and pore size distribution. Today this IBAS surface porosity measurement is an important supplement to the previously known measuring methods with which the surface of ceramic covers are described and defined. Now it is possible to give clear statements about the diameter relation of filler particle and cover pore.
The manufacturers of fabrics, fillers and ceramic covers now can play an active role in optimizing their products further to assist the paper makers' efforts in achieving a higher productivity in modern sheet formers.View full abstractDownload PDF (896K) -
Tomohiro Maezono1998 Volume 52 Issue 2 Pages 232-238
Published: February 01, 1998
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSMaintech Co. has developed Dryer Deposit Prevention system which modify the surface of dryer to be deposit-free. Achievements of the system has proven that the modified surface has low wettability to prevent the contaminants from adhering onto the dryer and eventually improve producivity and paper quality.View full abstractDownload PDF (702K) -
[in Japanese]1998 Volume 52 Issue 2 Pages 239
Published: February 01, 1998
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSDownload PDF (204K) -
On Single Wall Fiberboard with Symmetrical Thickness StrengthSatoru Matsushima, Shigeo Matsushima1998 Volume 52 Issue 2 Pages 242-251
Published: February 01, 1998
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSWe investigated a stress generation made for the semichemical corrugating medium (SM) of single-wall corrugated fiberboard (SWCF) by the compressional force under uniform bending of the bending moment axis in perpendicular to the machine direction (MD), and attempted to derive an elastic expression for its generation bending stress σsp. Using this expression, the analysis of σsp was carried out. Values of lateral force Wsx and fixed moment Mso made from the compressional force per unit length at the joint between kraftliner (KL) and SM are determined, and relations hips between those values and the shape of SWCF are considered.
The following results are obtained from the expression. The maximum value σspmax of |σsp| is found at the joint on the outer surface of SM. The absolute maximum σkpmax of KL generation bending stress for the compression decreases slightly and σspmax increases slightly with the increase of the SM thickness Ts. And σkpmax increases markedly with the increase of SM wavelength L and decreases markedly with the increase of SM waveheight h, and σspmax increases markedly with the increase of L and h.View full abstractDownload PDF (1016K) -
1998 Volume 52 Issue 2 Pages 252-258
Published: February 01, 1998
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSDownload PDF (4974K) -
[in Japanese]1998 Volume 52 Issue 2 Pages 259-260
Published: February 01, 1998
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSDownload PDF (339K)
- |<
- <
- 1
- >
- >|