Ionic liquid treatment for increasing the wet strength of paper was studied. The treatment conditions with the ionic liquid 1-butyl-3-methylimidazolium chloride（［BMIM］Cl）were investigated for improvement of the wet strength. First, the ［BMIM］Cl（20g）was melted at 80°C and the paper was immersed in it for 5-30 s. Next, the paper was immersed in ethanol, and finally, it was washed with distilled water. The paper was dried in a hot press at 110°C and 1.1 MPa for 5 min. The wet strength of the paper was improved by the ［BMIM］Cl treatment. Disintegration of the papers was investigated by immersing them in distilled water, and the paper treated with ［BMIM］Cl did not disintegrate. The minimum treatment time required for improvement of the wet strength of the paper was only 5s. The ［BMIM］Cl used for the treatment was recovered by vacuum distillation and dehydration was used to treat new paper. This recovered ［BMIM］Cl had the same function as the virgin ［BMIM］Cl in enhancing the wet strength. Therefore, the ［BMIM］Cl could be efficiently re-used in this method. The paper treated with ［BMIM］Cl will be composed completely of cellulose. Therefore, this method is a viable alternative to treatment by adding chemical such as a polyamideamin epichlorohydrin（PAE）．

In this study, we have developed high efficient estimation method of forest biomass volume using an Unmanned Aerial Vehicle（UAV）．Three-dimensional data of forest canopy was generated by Structure from Motion from sequence aerial photographs taken by UAV and the biomass volume was calculated from the spatial volume between canopy and terrain on 15 plots（0.04 ha/plot）in northern Brazil plantation. We could investigate larger forest area by UAV than current method. The coefficient of correlation between spatial volume and actual biomass volume was high（R=0.88）．

This report illustrates the recent trend and the future of digital print as well as a digital print solution. As for the recent trend, most OEMs launch new high-speed machines with high resolution. Furthermore, they propose new solutions trying to print on offset coated paper using aqueous pigment inks. The solutions are classified into three ways：1）primer treatment, 2）direct print without any primer and bonding agent, and 3）intermediate transfer system. On the other hand, as for the printing market, “the value of paper” is now being re-evaluated. Because the paper media is a device sensuous to the human five senses. Many marketers realized that particularly, catalogues, brochures, and direct-mails are very stronger tools to impress customers than the web marketing alone. We show these case studies from the global media, and the making of the personalized brochure based on a real content.

The thermal paper, which is imaged and printed by heat, has been launched for over 40 years. The application at the dawning of the thermal paper was for facsimiles, and then the receipt of stores was developed. The applications of the thermal paper have been extended to various areas, such as transportation and logistics labels, food packing and weighing labels, tickets and the imaging media for medical.

The quality at the dawning of the thermal paper was not so good. The dynamic sensitivity was low and the printed image faded out little by little. The dynamic sensitivity was improved with various technologies. As one of the examples, an undercoat layer was applied between base paper and thermal layer to improve insulation. The image fading also was improved with thermal formulas, which applied new developers and various kinds of chemicals as additives.

This article describes the development and the changing applications of the thermal paper, and introduces the latest technology of the thermal paper.

In the publishing and advertising industry, digital printing has expanded the market as a promotion tool that meets customers’ needs. Digital printing, which makes it possible to print such variable information as customers’ addresses and names, local advertisement, and guidance of goods based on customers’ preference, has steadily become popular in the market with the spread of the device. Credit card bill, cell phone invoice and direct mail etc. are very familiar to us, and we can imagine that digital printing related would increase in the daily life.

Inkjet printing which doesn’t require plate making and is advantage of a small amount of printing, has begun to penetrate even in the printing industry. The authors have developed the inkjet paper by the selection of optimum ink fixative, the setting of optimum range of ink fixative volume and size press coat weight in order to add the quality of each grade required for the inkjet paper. This paper introduces the technical development of inkjet paper which the authors have studied so far.

“For sound or noise in industrial world” is the five in this time. This explanation is a noise by the contamination. The contamination accounts for 14% of the whole of the problem that the damage at the early stage of the bearing doesn't reach the calculation longevity. The contamination exists from small one to the big one, and from rigid to soft. And, there is the solid and liquid. I present the example of the soft solid one by this contamination, deprave the longevity of the bearing by it, and tell how the noise is generated.

Lime kiln is important in the causticizing process, but it is hard to notice abnormal for large facilities. Therefore, we made equipment diagnosis in order to understand the current state of the kiln. The main diagnosis item is the kiln core accuracy, shell ovality, and wear of tires and rollers. A result of the diagnosis, it was found that kiln core runout and shell ovality and roller wear is large.

We have promoted the repair using the submitted recommended maintenance items from the facility diagnostic manufacturers.

Multi-variable model predictive controller（MPC）is widely used at process industry for more than 20 years. MPC makes significant quantities of benefit by stabilizing and optimizing process operation. MPC is also widely applied to fiberline units in North America and Europe. However, only few application experiences are exist in Japanese pulp and paper industry at this moment. This paper introduces Honeywell’s proven state of art MPC, Profit Controller and its application results to continuous digester. Profit Controller already has many experiences at other process industries in Japan. Some implementation and maintenance tips obtained from these previous experiences will help MPC application and utilization at fiberline units. MPC will make large benefits at fiberline units and enhance international competitiveness of Japanese pulp and paper industry.

Fiber wall thickness is an important parameter as it influences the strength properties of the pulp, but so far it has not been possible to measure it online. There can be a number of reasons to measure fiber wall thickness online. It is an efficient method for raw material control to make sure that the mix of e.g. saw mill chips, roundwood from thinnings, different species etc. is done so that a consistent pulp quality is maintained. The FWT module can control the efficiency of a fiber fractioning process. By measuring fiber wall thickness it is possible to calculate strength data and suggest level of refining to pulp customers, helping them achieve the requested paper and board strength properties.

AMETEK SurfaceVision developed new inspection system “SmartView 7.2C” with color line camera. The system allows users to set color defect classes by additional more than 20 color defect features. Learning classification tool “SmartLearn” is useful for classification especially for color defects.

Users can focus on making Defect Library of color defects without struggling with color defect parameters.

Worldwide, the use of recovered paper accelerated around 1990. The yearly increment of paper and paperboard production was supplemented with recovered paper, leaving wood pulp production stagnated. By region, Europe as a whole and especially Germany among them promoted the use of recovered paper like Japan. In the USA, on the other hand, its utilization rate was limited, 21% for newsprint and 27% for paper board. It exported 40% of the recovered mostly to China（2015）．China is increasing its output, using imported recovered paper since 2000, and now the largest producer in the world.

The world paper industry would not have existed without recovered paper.

The recycling rates of other industries in Japan in 2012-2014：glass：35%, steel：25% and cupper：24%. The paper industry is a recycling industry indeed.s

Research was conducted to clarify the relationship between natural ageing and accelerated ageing of paper using paper naturally aged for 90 to 130 years. In order to estimate the degradation rate of paper at room temperature, sealed tube method was conducted in four temperature comditions between 60 and 90℃. The degradation rate indicators at room temperature were calculated by Arrhenius plots. With regard to the estimated degradation rate indicators of tear and burst indices of paper samples at room temperature, degradation tended to be faster in sealed tube method than in suspension method.

On the other hand, degradation rate of discolouration showed an opposite result. The correlation of the hydrogen ion concentration before accelerated ageing and the estimated degradation rate indicator of tear index at room temperature showed better relationship than those at uniform higher temperature. Thus, in order to evaluate the permanence of papers，it is desirable to obtain room temperature degradation rate through Arrhenius plot.