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Paper tension is the most important control parameter in roll material production that directly impacts the printing quality of the web offset. Based on the closed-loop paper tension control theory, by conducting a research into the simulation of paper tension control system with MATLAB/SIMULINK, presented the closed-loop control diagram about the paper tension control system. Under different control parameter, the value of the overshoot, respond speed and residual of the system varies. As a result, the quantitative research on the simulation of the system offers a valid means in improving the control accuracy.

As demand for clean and healthy environment, people make many alternate solutions to save the environment. To save trees and overcome landfill of waste material and waste disposal by burning activities issues (cause to losing energy and increase pollution), people nowadays take recycling as a recovery. Recycling waste paper into new product increased over the years. Shortage of wood supply required new sources of natural fiber for papermaking industry. Many researchers have studied new sources of natural fibers from non wood materials, such as oil palm residues, kenaf (Hibiscus Cannabinus), pineapple leaf, banana, and coconut fiber. Kenaf is choose as reinforcement agent for recycled waste paper to maximize the use of kenaf in industry application due its wide range of advantages where pineapple leaf are choose as reinforcement agent because abundantly of these material in Malaysia. Reinforcement of natural fiber into waste paper during recycling process expected to increased strength properties of final product. To understand the right and suitable processing method for kenaf fiber and pineapple leaf leaves previous work from other researchers are studied to investigate pulping procedure of natural fiber and its effect on mechanical strength.

This research is about an attempt to evaluate the effect of water contents towards the packaging properties of paper made from coconut coir, which was being processed manually through beating times method. The purpose of this investigation is to relate the composition of coconut fibre and water content with the tensile strength and tear factor. The composition starts from sample A, which has 90% of water and 10% of coconut fibre. The sample continues with 10% decreasing content of water and 10% increment of coconut coir. Base on tensile test and tear test results, graphs were plotted and it shows sample D, with 60% of water and 40% of coconut coir has produced the highest tensile strength, breaking length and tensile index, with the value of 1020.6 N/m, 422.8 m and 4.1450 Nm/g respectively. On the other hand, sample A produced the highest tear factor, with the value of 92.7 g/mm2. As a conclusion, these packaging properties are good enough to become guidance in paper manufacturing industry, as well as to support the application of coconut coir fibre as an alternative packaging material in the future.

This paper intend to study the role of adhesive in inkjet paper coating, comparative experiments are used to explore the amount of glue on the paper performance adhesive paper under different proportion of both PVA and AVE the analysis and research, parameters lay the basis for the use of inkjet paper coating adhesive.

As a important part of teaching, Traditional paper analysis algorithm is complicated and not comprehensive enough. This paper according to the indicators of education measurement and improves the traditional calculation models, the system assesses the perfect calculation model, The teacher also can get the true and fast reaction to students' knowledge and the quality of the paper. This method thereby provides a convincing basis for the improvement on the future teaching and increase the effectiveness in teaching

High whiteness paper is likely to cause visual fatigue. The relationship between whiteness and visual comfort is studyed by adopting the form of a combination of presentation reading and questionnaires. The experimental results show that, during the reading process, the higher of paper whiteness, the greater the chance of looked up, eye rubbing, and other little tricks, at the same time, the easier inattentive, have a negative impact on reading effect.

Humidity control paper board comprising natural polymer derivatives, porous natural minerals, inorganic salts, natural moisturizing material and paper was prepared by simple physical blending and its humidity control properties were tested. The moisture adsorption and desorption rate are 0.82 g/7h.g-1 and 0.71 g/7h.g-1, respectively. The adsorbed moisture amount is 0.85 g/g. It can maintain the relative humidity (RH) range between 50% and 60% within 20 min at 25 ℃. Above all, the prepared paper board shows pronounced humidity control properties and the preparation technology is simple, which is feasible for production in large scale.

The force analysis on the in-plane and out-of-plane of honeycomb core referring to some related articles is presented. during the transportation of wine, the honeycomb paper core is under three-dimensional stress. According to stress condition in the process of wine packaging and transportation, based on the fourth strength principle, the equivalent load is obtained. And the stress with different stretching angels with virtual sampling method is calculated. Thus, the optimal stretching angle of honeycomb paper is acquired, which is .

A novel composite humidity control material was prepared, in which konjac glucomannan grafted on sodium polyacrylate with halloysite loading, adopting aluminum chloride/sodium bicarbonate system to foam, and twice foaming to form porous structure in the composites by heating at 150 ℃. The resultant composites were utilized as substrates and applied in a composite humidity control paper making. Humidity performances including hygroscopicity, moisture capacity, moisture absorption and desorption rate were tested. It was found that the composite paper presents good humidity control performances even in amplified experiments.

γ-Al2O3 namely activated alumina or alumina gel is widely used as a pigment on the inkjet paper at present. But it is easy to come out a particles agglomeration problem to restrict its application. In this paper, the γ-Al2O3 with coupling agents were modified to improve its dispersion in water. In the modification process, the he main modification parameters such as aluminum-zirconium complex oligomeric coupling agent TL-3A were selected to study. The parameters of addition, modification time and modification temperature were discussed. During the experiment, the best modification conditions were determined via orthogonal experiments. The polydispersity index PDI was used the target parameters to inspect via orthogonal experiments results and the affected factors. We found the best addition quantity of coupling agent, modification time and modification temperature to reach the minimum of the polydispersity index PDI introduction. The results showed that the best condition for carbonization alumina was: the best condition for export γ-Al2O3Subscript text 2.0%, modification time 30min, modification temperature 50℃。

In order to improve the physical and color laser printing properties of paper, the polyvinyl alcohol and silica were used for pigmental surface sizing of paper. Under the previous conditions of solid content 12% and 14%, the effects of different ratio of PVA and silica such as 100:0, 15:1, 10:1, 5:1, and 1:1 on the physical properties of paper and laser printing performance were investigated. The brightness, opacity, roughness, color density, gray scale and image definition were measured after the surface sizing paper was calendared under the condition of temperature 70℃ and pressure 4MPa. When the solid content was 12%, PVA: SiO2 was 1:1 and the solid content was 14%, PVA:SiO2 was 10:1, the brightness and opacity of paper obtained the maximum values. With the increase of silica proportion roughness increased at first and then decreased. Color density and tone reproducibility of paper was significantly improved by the pigmental sizing treatment as well as the dots and lines definition. The reasonable pigmental sizing scheme was as follow: solid content was 12%, PVA:SiO2 was 1:1, sizing temperature was 60℃, calendar temperature was 70℃ and calendar pressure was 4MPa.

Paper based printing plate is one of printing plates used in eight mo octave or specifically offset printing machine. In the printing process, the printed plate wants to keep its shape by the pressure, the friction and tension. It needs to have good dimensional stability and good ink-water balance of coating. This paper discusses the influence of different coating formulations and coating process on the mechanical properties of paper-based printing plate. In this paper, the wet strength of paper-based printing plate of different formulations and different coating amount were tested. The study provided the theoretical basis for ink-water balance coating formulations of paper-based printing plate and the plate production.

Based on the Vacuum Aluminized Paper, this thesis mainly researches the ink absorption test method of high reflectivity paper. It demonstrates the ordinary K&N method which use whiteness meter to measure the paper reflectivity is not applicable to the Vacuum Aluminized Paper, which by means of combination of theoretical analysis and experimental verification. And through analyzing its key characteristics, the K&N absorption test method has been improved and final use glossiness meter with 45°angle to measure the paper reflectivity and use K&N index to represent the ink absorption ability. This method can be used in high reflectivity paper, such as Vacuum Aluminized Paper, and the K&N index can relatively truly response the ink absorption ability. Our experiments show that the improved K&N absorption test method can accurately measuring the ink absorbency of high reflectivity paper.

In order to prepare high-gloss water-soluble gravure varnish which is used on tipping paper, different content and types of filming resin with different content of all kinds of additives added are used to prepare water-soluble gravure varnish. Test its main performance and then use IGT apparatus to proof. The effect of varnish component and content on glossiness of water-soluble varnish is discussed by measuring glossiness of proof. The results show: different content and types of water-soluble filming resin have a great influence on the glossiness of water-soluble gravure varnish which is used on tipping paper; the glossiness of water-soluble varnish film can improve by adding auxiliaries such as cosolvent, substrate wetting agent, flow agent, wax emulsion and other promoter into water-soluble varnish system.

The impact of coated paper printability for image quality on the high-fidelity digital printing was studied in this paper. Compared with the traditional printing technology, high-fidelity digital printing technology is more likely to expand the color gamut, maintain the original tone linear and produce vivid image. The performance of coated paper to a large extent determines the image quality. In order to get high-quality printed matters, the mechanism of the coated paper printability influencing on the performance on high-fidelity digital printing is need to be researched in-depth. The printability of coated paper was studied from several aspects in this paper, including the structural properties, roughness, optical properties, absorption etc, the relationships between these properties and printing color, dot reproduction performance were also studied. Based on the previous theoretical and practical studies, the printability evaluation system of coated paper on high-fidelity digital printing was established initially. On digital printing, accurate color management technology also affects the printing quality as the performance of coated paper, so the advanced color management technology was also used in the current study. The results showed that the pore structure and the absorbent of coated paper were the most important factors for affecting the printing quality, and the roughness and optical properties of coated paper also had a certain impact.

The precondition of improve the printing press velocity is to maintain the minimum vibration of infeed unit within the range of press speed. Taking advantage of the equivalent relation between the formula of infinitesimal energy and the classic beam theory, the vibration of convey paper belt can be converted into the problem of the beam be stretched and be compressed, and then we utilize the finite element simulation technology to conduct model analysis for the convey paper belt. When the numerical of the belt speed gain ,both the vibration and shape distortion reach the maximum, as well as speed of the infeed unit will be influenced most.

Rich mineral paper (RMP) has the advantage of being energy efficient, clean and creating no pollution during its production processes, with low production costs, and enjoying naturally complete biodegradability, fully compatible with the emerging demands for energy efficient carbon reducing features and the trend for environmentally green solutions, so if this media can replace traditional paper uses to become a new print media, tremendous environmental efficacy can be expected. So this study aims to discuss the print quality performance characteristics of RMP applications in large print run offset printing operations. The study deploys True Experimental Study methodology, with use of the digital printing test target of Graphic Arts Technical Foundation (GATF), with flat offset printing on traditional coated paper and eco-friendly RMP, printing 800 sheets of each, with systematic random sampling of 35 samples for the study. Quality determinations rely on X-rite i1 Pro for elucidation of the printing quality characteristics for solid ink density, TVI, contrast, gray balance, and color gamut measurement. The results of this study indicate the KCMY solid ink density and contrast of the eco-friendly RMP were less than traditional coated paper; TVI value was higher than traditional coated paper; color gamut performance was less than the traditional coated paper. Optimal gray balance combination for RMP was determined as follows: 7% tone with C7M3Y4, 30% tone with C30M28Y26, 60% tone with C60M58Y5, and 80% tone with C80M76Y66. The study suggests that ink particularly suitable for RMP uses remains in need of development. Additionally, the study found that use of RMP in the paper machinery indicated transverse and longitudinal tensile strength is slightly inferior to the traditional coated paper, resulting in unsmooth surfaces post-printing, for which it is recommended that RMP makers should consider paper machinery structural aspects when pursuing future research on modifying solutions for greater printing efficacy with RMP.

The paper properties such as roughness, gloss, surface wettability and other factors have great influence on the dot reproduction attributes of presswork, and different paper factor has different effect weight on the dot reproduction. The main purpose of this paper is to provide a new method to analyze the influence of paper properties on the dot reproduction. The method is to apply the grey relational analysis to analyze the influence law and the effect weight of paper factors on the dot reproduction during inkjet printing, which could provide theoretical guidance for improving the printability of paper. The grey relational analysis is a multi-factor statistical analysis method, which is based on the sample data and the grey incidence of various factors and is used to describe the strength, size and the order of the relationship between the factors. In this experiment, five types of inkjet printing paper were used to test their printing performance, and then the dot gain data were dealt with by the grey relational analysis method. Results showed that paper properties had a great influence on ink setting. Ink drop diffused and deformed less and dot gain was small when paper had smooth surface. According to the correlation coefficient degree of paper properties which influence on the dot gain of inkjet printing, the sequence was whiteness, roughness, surface wettability and gloss. Whiteness and roughness could significantly influence dot gain, followed by surface wettability, and gloss with minimal impact. Experiment indicated that the grey relational analysis was a simple and effective tool to analyze the influence of paper properties on the dot reproduction of presswork.

As global environmental consciousness emerges, use of high technology to reduce environmental pollution has become a critical imperative for economies the world over. In recent years’ development and applications of ICT monitors have increasingly served to displace traditional paper based displays, yielding tremendous environmental efficacy. Digital e-paper displays enjoy numerous competitive advantages including energy efficiency, eye friendliness, resilient durability, and readability, but are currently generally only deployed in e-book uses, so enhancing their application scope, in addition to relying on their reading comfort, the market will no doubt develop appreciable economic and environmental benefits. Hence this study deploys the perspective of applications innovation, to explore uses of e-paper solutions in MRT advertising contexts on the advertising efficacy aspects of both advertising memory and advertising attitudes. This research relies on in situ experimental methods, at an existing MRT station in Taipei on the island of Taiwan, through convenience sampling to select 100 study subjects, who were asked to view two encased displays (either a digital e-paper display or paper display) with public notice contents, prior to completing the study survey and statistical analysis of the valid responses. The study findings indicate that, for the general public MRT patrons, digital e-paper advertising solutions yielded optimal efficacy for both advertising memory and advertising attitude, with significant results along the dimensions of both advertising receptiveness and interest.

With the rapid development of the information technology and digital image copy devices, the information carrier shows off diversified trends. However paper media still play an important role in many areas serving as information carrier, and correspondingly the information security of paper documents faces great challenges. So how to solve the information security problems of paper media has become the hottest research topic. This paper proposes an information hiding method used in printed documents image based on the screen dots modulating shade composed of a large number of randomly arranged screen dots. These dots are classified into coding dots, anchor dots and perturbing dots respectively. Experimental results show that screen dots modulating shade using our method has larger information capacity and also has strong robustness against the attacks of print-scan processes. Moreover, this technology also can be widely used in many other areas, such as anti-counterfeit printing, anti-copy, document content tamper-proofing and document image retrieval etc.

Based on wet paper code, integer wavelet and matrix coding, this paper constructs a new steganographic algorithm. Combine with the advantage in integer wavelet domain, which more close to HVS, a part of secret messages are embedded by LSB in high-frequency coefficients after integer wavelet switch, wet paper code is used to change the direction of embedding. Another part of secret messages are embedded by matrix coding in low-frequency coefficients after integer wavelet switch, wet paper code is still used to change the direction of embedding. The performance of the proposed approach shows that security and capacity of secret messages are improved in integer wavelet domain.

A kind of paper-separation mechanism of packing machine for medicine was introduced in this paper. A new parametric equation of cam profile is designed on the basis of the kinematics rules of suction nozzle. Model building of cams are accomplished by using software SolidWorks.

In this study 3 geometry for ONAN cooling system of power transformers are numerically simulated with (Perforated nomex) and without insulating papers (Netting tape). Geometries are A, RA, and R type. The A type has just axial channels. The RA type has radial and axial channels but there are no baffles to drive the flow into radial channels. The R type is like the RA type but with baffles. Insulating paper used in this study has some holes to cause some vortex in flow to increase heat transfer. The CFD code used is Fluent 6.3. To simulate flow in natural convection mode, Boussinesq model and pressure inlet and outlet boundary conditions are used. Results show that the most effective geometry is the one with baffles that drive flow in radial channels in addition to axial channels. Streamlines near the holes in papers show that that height of holes is too small to affect heat transfer and, so, the comparison between geometries with and without paper shows the types without paper have higher heat transfer coefficients.

Gray balance is the basic and critical control parameters of color reproduction, which plays important rule as lever in color reproduction which balance the correlation of material characters and process control parameters. This paper focused on investigation about gray balance data variation caused by slight chromaticity deviation of printing material. In the experiment the creation procedure of gray balance curve was simulated by EPSON Stylus Pro7880c ink-jet printer, and delivered curves were compared with each other. Accordingly the tone value variation of primary color was analyzed in terms of chromaticity deviation of paper. Meanwhile the variation tendency of gray balance impacted by ink and paper property was qualitatively discussed according to data comparison with G7 method. Results show that tone value of Y is so sensitive to paper chromaticity deviation that even the dominant relation between Y and M tone will be altered. At the same time, the more the ink and paper property coincide with ISO standard, the more curve of gray balance curve coincide with theoretically ideal value.

paper formation, smoothness, bulk, ink absorption, printability. Abstract. The impact of the paper formation on smoothness, compressibility, uniform of ink absorption is discussed in this paper. The experimental esults indicate that the paper with bad formation leads to higher apparent bulk, and the paper with bad formation shows nonuniform calendering and low compressibility. The bad formation of paper also results in deformation and omission of printing dots, which affects directly the reproduction of the printing images.

The color reproduction is based on visual perception. The psychophysics experiments present the light source; illuminants and view background affect the results of color matching. Paper is a typical substrate for printed color matching and effects printed color greatly. Now almost all of print papers contain optical brightening agents, which changes significantly the color appearance of printed color and makes color shifting of printed color matching. This paper used CAT02 chromatic adaptation models to transform the measurements of printed color in paper with and without OBA, compared the effect of printed color matching between before and after transforming with display, present the method using chromatic adaptation transforms to improve the accurate of printed color matching.

In this paper we evaluated some surface characteristics of the Vacuum Aluminized Paper (VAP) to explore the ink adhesion on it. It is shown that this performance is quite unsatisfying due to the high gloss of the VAP which results in an even weaker surface energy than the surface tension of ink. The optimal drying time for the inked VAP under UV light with 125W of power is approximately 4.5 minutes, converts to the practical production, the printing speed of the VAP should be near to 7128 sheet/hour so as to fully solidify the UV ink thus acquires the optimal adhesion of ink.

Based on the analysis of the characteristics of paper packaging products and development status of paper packaging enterprises, new relationship between customers and enterprises was built using personalized customization technology on paper packaging products. Simultaneously, the informatization management framework of paper packaging enterprise was set up through integrating modularization and management techniques.

The penetration and diffusion of ink droplet in paper coating have significant influence on the image quality in the inkjet imaging. The flight physical phenomenon of the ink droplet was researched and analyzed according to the hydrodynamic equations of multiphase flow discrete phase in this paper. Base on studying on the surface structure of paper coating, the mechanism of impact, penetration and diffusion between ink droplet and paper coating also was researched in this paper from the perspective of energy conversion in the imaging process. The proposed mathematical model consisted of the factors of hydrodynamic characteristics for ink droplet and the physical characteristics of paper coating, we could get the maximum diameter of ink droplet spreading in paper coating through solving the model and obtain viscous loss and energy consumption in penetration of ink droplet by experiment, and then calculated the average penetration depth of ink droplet.

This paper draws on a roll coating method which used for the production of coated paper. Polylactide coating cardboard was prepared through the solvent coating, and study its packaging performance. In this study, chloroform is based solvent, ethanol or n-propanol as auxiliary solvents, poly (ethylene glycol) or poly caprolactone as plasticizer, and the water vapor permeability, oxygen permeability and heat sealability of polylactic acid coated cardboard.

The antibacterial activity of nano silver against Escherichia coli was measured by the inhibition zone and minimal inhibitory concentrations. Results showed that the inhibition zone of nano silver was improved with the increase in concentration, and the MIC of nano silver was 15.6ppm. In addition, the antibacterial activity of the antibacterial paper was determined by inhibition zone method. The paper prepared by polyvinyl alcohol(PVA), sodium carboxymethylcellulose(CMC-Na) and starch adhesive had the greatest activity at a nano silver concentration of 400,800,600ppm respectively. The paper basis weight,tensile strength and elongation were all increased after coating.

Biopolymers have the potential to serve as coating materials for paper to improve its performance properties. The objectives of this study were to determine the effect of kelp coating on the physical properties of coated papers. It was found that kelp coated paper showed significant difference on physical properties, compared with uncoated. Kelp coated papers greatly increased in tensile strength. Paper coated with kelp solution can be used to produce packages with the potential to be used to maintain agricultural produce quality for the food industry, and may have other applications.

Silica of hollow structure exhibits a number of special characteristic. In this paper, a new way to prepare hollow silica spheres which can be used as filler for paper was reported. In this approach, when silica shells were coated on polyvinylacetate (PVAc) template particles by the sol-gel method, the PVAc cores would be dissolved synchronously, forming hollow spheres. Neither additional dissolution nor a calcination process was needed to remove the PVAc cores. The morphology of the hollow silica spheres was also characterized by TEM. It was shown that the hollow silica spheres with 130-400nm in diameter and 15-35nm in the shell thickness could be synthesized. The possible formation mechanism was also brought forward. The possibility and potential advantages in usage as filler for paper were analyzed theoretically. We confer that this filler can improve the printability of the paper, and reduce its density compared with traditional fillers.

The waste corrugated paper was grinded to paper pulp first, and then the paper pulp was used to prepare the foamed waste paper pulp/high density polyethylene（HDPE）composites by compression molding with HDPE. The Rosand double-barrel capillary rhepmeter was used to research the influences of the blowing agent AC(Azodicarbonamide) content，waste paper pulp content，temperature and different blowing agent on the melt of the composites. Scanning electron microscopy（SEM）was also used to observe the effects of different contents of AC and waste paper pulp on the cell morphologies.The results showed that: when the shear rate up to 600 S-1，the melt performs of the foamed waste paper pulp/ HDPE composites were pseudoplastic flow, and turn up wall slip phenomenon. The viscosity of melt was significantly reduced with the content of AC increased, but it increased with the content of the waste paper pulp increased. When the shear rate reduced to 275 S-1 or below, the viscosity of melt reduced as the temperature riased; while when the shear rate went up to 275 S-1 or high, the viscosity of melt increased as the temperature riased. When the shear rate reduced to 325 S-1 or below, the melt of endothermic blowing agent （NaHCO3）showed the highest viscosity; when the shear rate went up to 325 S-1 or high, the melt of exothermic blowing agent AC shows the highest viscosity. The number of cell increased and size of cell became smaller with the AC content increased , but the number of cell reduced and the size of cell became larger with the content of waste paper pulp increased observing by SEM.

Cationic polyacrylate emulsion was used as surface sizing agent and the effects of emulsion properties on paper printability were studied. Cationic polyacrylate emulsion increases the printability of sized paper. The printability has greatly improved increase with the increase use of emulsion dosage, but the increase of emulsion viscosity influences the printing operation, and one layer of emulsion has already achieve the desired effect, therefore one layer of emulsion is properly.

Cationic polyacrylate emulsion was used as surface sizing agent and the effects of emulsion properties on paper mechanical properties were studied. The mechanical properties of sized paper gradually increased with the increase of solid content, viscosity and positive charge density of emulsion and decreased with the increase of particle size of emulsion. Tensile strength, folding endurance and tearing strength on machine direction were increased 33.62%, 11.99%, 6.79% respectively when the paper with single emulsion layer was used oven drying methods.

Based on the Fick’s law, model about the migration of silver-loaded zeolite on antibacterial kraft paper was built, and migration of antibacterial agent in distilled water, 65 % ethanol and 4 % acetic acid at 2 h、24 h、96 h、240 h、480h、720h and 960 h under 40 ℃ were detected by AAS. The predicted and experimental results were compared using MATLAB software. The results are shown that the turns of migration in different foodstuff are that 65 % ethanol>4 % acetic acid>distilled water, while silver ion is not detected in olive oil and N-hexane. The migration in distilled water, 65 % ethanol and 4 % acetic acid can be well fitted with the predicted model, and the migration in 4 % acetic acid is similar with the model’s result in certain period of time, and migration of antibacterial agent from papers to food stimulants in different effective migration coefficient, depth of paper and time can be greatly predicted with.

In the present study, we researched the influence of storage time on quality of soy protein-celery composite paper. During the storage time, the protein content in the paper does not change significantly; Aerobic plate counts were decreased along with the increase of the storage time; Composite paper and celery paper color index values indicated that their value was related to the color yellowish-green (-2 to +2), except for celery paper in the 0 months; papers DPPH• radical scavenging rate sharply decreased, and was not detected till the third months.

Two equivalent models based on sandwich panel theory and equivalent panel theory were discussed in this paper. By analyzing the performance of fiber - paper honeycomb sandwich structure compound panel by bending load, the computational results are in accordance with test and Engineering software ANSYS. Therefore, it shows that the finite element equivalent models are reasonable and practical for the optimization design of fiber - paper honeycomb sandwich composites.

The influence of temperature and relative humidity on the moisture content of paper honeycomb sandwich panels was studied. The moisture content of paper honeycomb sandwich panels was fitted by three mathematical models. The fitting results were evaluated by experimental data, and the best fitting model and its parameters were determined. The results indicate that in three models, the GAB (Guggenheim, Anderson and De Boer) model is the best suited to predict the moisture content of paper honeycomb sandwich panels in different temperature and humidity conditions.

In this paper, we presented an approach to control on the total hardness over the wastewater treatment recycling process for pulp and paper mill. The main problem, however, is the effects of Ca2+ concentration on the recycling treatment process. The experiments were conducted by using coagulation method with reagents of Ca(OH)2 addition alone and Ca(OH)2 +PAC addition respectively to control on total hardness. The samples were collected from the effluent and the influent of the biological treatment tank respectively of the wastewater treatment plant in a pulp and paper mill. The experimental results identified that the optimum reagent addition position was in the effluent of the biological treatment tank. When addition Ca(OH)2 alone, the optimum Ca(OH)2 addition amount was 2g/L, as a result, 70.1% of total hardness was removed ( from 1088.05mg/L down to 325.16mg/L), pH value was from 7.23 to 8.61, and sludge volume ratio was 9.9%. When addition PAC+ Ca(OH)2 , the optimum Ca(OH)2 addition amount was 1g/L, the optimum PAC addition amount was 300mg/L respectively, as a result, 71% of total hardness was removed( from 1088.05mg/L down to 315.25 mg/L), pH value was from 7.23 to 7.66, and sludge volume ratio was 6.5%. The effluent-quality can meet the National Industrial Wastewater Recycling Standard on the total hardness of 450 mg/L requirement. The reagents of Ca(OH)2 +PAC had many advantages over Ca(OH)2 alone , such as less sludge quantity, high density of sludge, small volume of sludge, and less addition of reagents and so on.

Impregnated paper for plywood formwork is an important material for the production of plywood formwork. It was developing with plywood formwork and the market had been expanding. Absorption and wet strength are main factors which can effects on the property of impregnated paper. In this paper, mechanical chemical pulp and waste paper were used to make special impregnated paper for formwork. The ratio of EMP, dosage of aid, and operation conditions were discussed. The result showed that the absorption was improved by increasing ratio of EMP, adding agent, drying quickly, and lighter pressure. A certain ratio of AOCC is necessary to ensure strength. The paper also discussed the difference of white spot between bamboo plywood formwork and plywood formwork which indicated that white spot caused by waste paper .However, it wasn’t damage the quality of structures.

After introducing the principle of ventilation and dehumidification for closed steam hood, the key and difficulty points of its control are analyzed. Aiming at the production line of coating white board with surface sizing and high steam consumption, DCS system of steam hood based on SIMATIC S7-300 PLC is designed. The hardware structure and control algorithms are illustrated in detail. The control system has been applied on the paper machine with nearly 10 board paper plants of the coating white board paper base in Fuyang, Zhejiang province, and the good energy-saving control effect has been obtained.

In this paper, the drying experiments of paper sludge were performed at different drying conditions. The drying kinetics and phenomena of paper sludge were investigated. The effective diffusivity and the activation energy of the paper sludge during drying had been evaluated. At the same time, seven empirical models were used to model the experimental data, such as Newton, Page, Modified Page, Henderson and Pabis, Logarithmic, Two term, Two Term exponential et al. Three statistical parameters (The coefficient of determination (R2), root mean square error (RMSE) and the residual sum of square (RSS) ) were used to evaluate goodness of fit of the tested models.

The paper takes self-developed great aqueous inking oil formulated into screen-printing aqueous ceramic ink under glaze color of once firing as the breakthrough point to choose proper decal paper and the best paper structure. It adopts modern screen-printing technology and searches new production process of ceramic decal under glaze color to solve some problems, such as the uselessness of fine lines, the mistakes of the short line, fault ink and color problem during delicate screen-printing and appliqué, and the defects of injury of glaze during appliqué, and to research new and high-grade screen-printing ceramic decal paper under glaze color of once firing.

In this research, paper material with different performance (e.g. brightness, fiber type, filler retention, coating weight, etc.) is the main subject. According to analysis of physicochemical properties for paper material and experimental results for corresponding printing qualities, the research presents the relationship between paper optical property and printing quality. And on that basis, it also pays more attention to optical effects (such as reflection, scattering, absorbing, concentration) and mechanism of paper with different brightness, research on best visual brightness, contrast and so on, which reveals vision laws among paper optical performance, printings and humans.

Mica paper is made as one kind of insulation material, but low strength limits its applications. Surface modification is proved to be an effective way to enhance its strength. In this paper modifier like ethylene diamine tetraacetic acid, cationic polyacrylamide, cationic starch, ethylene diamine tetraacetic acid plus cationic polyacrylamide and ethylene diamine tetraacetic acid plus cationic starch are introduced to improve strengths of mica paper. Finally ethylene diamine tetraacetic acid plus cationic starch is chosen as modifier of mica flakes. After modification mica paper can reach high tensile strength of 19.84N/cm, which is more than six times high than mica paper without any modification.

The influences of the paper properties on ink-jet printing quality are very complex. In order to predict the printing quality quickly and accurately, it is necessary to establish a mathematical model and an evaluation system, based on which we can estimate the paper used for ink-jet printing is suitable or not. In this paper, five kinds of ink-jet papers with different properties were chosen, and the properties including brightness (X2),gloss(X3),roughness(X4),air permeability(X5) and absorbency(X6), were tested; then ink-jet printing in the same conditions was carried out and different printing parameters were tested, including solid density(D),dot-gain(DG),print contrast(K)and hue(H). Through combining analysis of each single printing quality parameter with some paper properties by using PCA of SPSS, the correlation functions D/DG/K/H(X2, X3, X4, X5, X6) were obtained. Meanwhile, a comprehensive function Y(D, DG, K, H) involving the printing quality parameters was achieved through synthesis data processing of SPSS. This study shows the influences of paper properties on the printing quality parameters and their corresponding weights, and it also proposes a prediction model of paper printability, which can provide a theory reference for printing work in ink-jet printing.