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Along with the low carbon environmental protection concepts’ widely spread, the market of derivative paper, such as corrugated props, is gradually causing the focus of the society. The method of system design and advanced tools mean that the use of paper props can be promoted. Combining the design experience of related fields, this paper focuses on standardized method in designing paper props and studying of parametric design based on the software of Box-Vellum.

To study deeply ink penetration condition inside the paper, an ink permeability model on the basis of Kubelka-Munk theory is built up in the paper, and infer out the formula of ink penetration depth, consisting of paper thickness and various brightness. And then the test value and calculation value of ink penetration depth are compared. The study results show that the two values are almost the same, so the state of ink penetration depth can be effectively estimated just by paper brightness.

The application of nanosilica in coating of art paper and ink-jet paper is studied. The results show that when nanosilica is used in art paper coating, the dispersity and flowability of the art paper coating are excellent. The surface strength, smoothness and gloss of the paper coated with art paper coating with nanosilica are improved and its yellowing rate is decreased. When nanosilica is used in ink-jet paper coating, the dispersity of prepared ink-jet paper coating is of better, the coated paperboard with ink-jet paper coating with nanosilica is of ink transfer larger, K&N value higher and whiteness higher. The smoothness and gloss of paperboard coated with ink-jet paper coating with silica are improved. The combination application of more kinds of adhesives improves the print gloss of paperboard coated with ink-jet paper coating with silica.

The methods of synthesizing polyurethane (Isophorone diisocyanate IPDI) with paper were investigated. The combination of SEM and IR analysis were used to analyze the chemical and physical characteristics and forming mechanism of the polyurethane derived from paper. The physical of base-paper material improved remarkably on the conditions of dosage of IPD 12%, reaction time 10min and temperature 60°C, facture length elevated by54.4%, folding strength raised by 12.4 times, and wet strength / dry strength was 50.54%.It was found that carbonate bond was formed between IPDI with cellulose in fibers when the paper was treated with IPDI .The treatment can change hydrogen bonds into chemical bonds and enhance the base-paper material’s physical strength. The Hydroxyl of Cellulose and －N=C=O produced the structure of amino formic acid ester, which formed as a bridge between the fibers. The hydrogen combining was transformed to chemical combining, which strengthened the intensity of single fiber and reinforce the combine of fibers. The treatment can change hydrogen bond into chemical bond and improved the paper’s physical strength, especially the wet strength.

The aim of this paper is to present a finite element method to predict buckling characteristics of paper honeycomb sandwich panels with composite skins under dynamic axial compression via ANSYS/LS-DYNA. First of all, some problems of the conventional method using honeycomb plate theory, sandwich laminboard theory and equivalent panel theory were pointed out. In order to develop an effective predicting method, by assuming appropriate periodic boundary condition on the edges, a simplified finite element model on hexagonal structure of a unit cell for sandwich panels was developed utilizing the 3D finite element method. The effective Young's modulus of the cellular wall was obtained from the result of the test on the honeycomb core. Several useful conclusions are drawn about the axial crushing of honeycomb sandwich composites and unit cell and can be used to guide the design of composite structures. The paper further attempts to explain numerical results are well consistent with the corresponding experimental ones.

In order to explore the influence of ink viscosity on its permeability inside paper, three newsprints and three offset paper were firstly chosen to test their basis properties, then 5 ink samples including the original ink were prepared via adding different percentage printing varnish and their viscosities were measured. Under the definite printing condition, the 5 ink samples were printed on the surface of 6 papers with a printability tester respectively. At last, the ink penetrations inside these papers were all tested with a metallographic microscope. The study showed that the decreasing of ink viscosity would lead to the increasing of ink penetration depth, and paper properties had some effects on the ink permeability.

From 1997 to 2009, altogether 2853 papers from 48059 papers extracted in SCI-Expended on bioinformatics could be attributed to Chinese scholars in the world. This study examined the top 30 SCI-E journals that published the largest number of papers on bioinformatics written by authors worldwide and by Chinese authors respectively, and measured collaborations amongst country and the productivity distribution of relevant institutions in the world, the languages in which documents were published, the mode of publication (e.g. article, reviews and proceedings paper etc.). This study will provide general insights of the characteristics of bioinformatics research papers written by Chinese authors.

The teaching effect assessment is an important part of teaching work, usually for the teaching evaluation means more imperative, and by the quality of the exam paper will directly affect the result of teaching evaluation. Usually, when the papers or teachers to huge question the subject in a selected from several, or the relevant books of the topic selected a papers, such was slow and arduous, and it was difficult to ensure that the test coverage and grasp the papers of difficulty. In order to make the teacher from heavy proposition work liberate, and improve the quality and management of proposition modernization, scientific, standardized, a test paper generation system has been developed. The Paper Generation System is designed and implemented based on the sufficient needs analysis in this paper, It mainly implements some functions include in manually and automatically generating papers, extracting some of existing papers, maintaining user information and so on ,the system can operate stably in Windows2000/XP/Vista platform ,reach the expected goal and have some practical value.

Small-scale burning experimental study of computer monitors and paper was done based on cone calorimeter. The small and middle scale fires were simulated by changing the heat radiation intensity of cone calorimeter. The heat release rate, mass loss rate and production rate of CO was measured in experiment. The data of mass loss rate and CO production rate is fitted, and the formula of its change with time is obtained. The computer monitor has slow pyrolysis speed on the 35 kW/m2, and the carbon layer on surface gradually thickened. So the heat will accumulate, and then the pyrolysis speed increases. The heat release rate reaches to the second peak. The fire growth index of monitor increases as the heat radiation intensity. But the fire growth index of paper has the opposition trend. The CO production rate of computer monitor is larger than paper’s. The experiment results can reflect the combustion characteristics of computer monitor on real fires.

To study deeply ink penetration condition inside the paper, an ink penetration model on the basis of Kubelka-Munk theory is built up in the paper, and infer out the formula of ink penetration depth, consisting of paper thickness and various brightness. And then the test value and calculation value of ink penetration depth are compared. The study results show that the two values are almost the same, so the state of ink penetration depth can be effectively estimated just by paper brightness.

The wet picking and wet repellence of offset papers were studied usingIGT-gst2printability tester according to change printing conditions as printing speed and the amount of fountain solutions. It was showed that the phenomena of wet picking and wet repellence occurred in turn on the surface of offset papers with increased printing speed and the amount of fountain solution. In addition, in contrast with fountain solutions, printing speed had greater influence on the phenomena of wet picking and wet repellence of offset papers.

Strengthening agent of cationic polyacrylate emulsion was prepared through semi-continuous seeded pre-emulsion processes. By single factor experiment, investigated the factors which influence on properties of emulsion, such as the proportion of hard and soft segment monomer, the dosage of AM, DMDMAC, emulsifier and initiator, reaction time and temperature, addition time and other factors. The results show that the emulsion has a good enhancement when the monomer ratio of St: MMA: BA is 2:1:3, initiator dosage is 0.7%, the dosage of emulsifiers, AM and DMDMAC are 6%, the amount of protective colloid is 0.3%. Compared to the strength performance between paper with added emulsion and blank paper, find that the performance of paper with added emulsion polymer gets different improves: paper quantitative increase 4.08%, folding strength degree improves 66.67%, tearing degree improves 356.52%, ring compressive strength improves 50.00%, tensile strength improves 44.11%, and bursting strength improves 50.88%

SNS provides us with a brand new platform to communicate, interact and share. To better suit the need of scholars to get more authoritative and more satisfactory information about academic research, we construct a SNS scientific paper management platform. In this platform, scholars are divided into different virtual communities accord to their research field and their collaborative relationship with others. Ideas in CF are applied in the procedure of community division which helps us to find the accurate relation structures. At the end of this paper, we use compare the running results of normal platform and SNS to illustrate how useful it is.

In this paper, the hemicelluloses was extracted by alkali from aspen, then it was made to be surface enhance agent by cationic modification. The original and modified hemicelluloses were characterized by FT-IR and GC. The effect of hemicelluloses species, content and treatment time on the strength of paper were studied. The results showed that the optimum content of cationic hemicelluloses for surface enhance was 6% at 35°C for 15s. In the conditions, the tensile strength and crushing strength were increased by more than one time. Compared with the original hemicelluloses, when substitution degree of the cationic hemicelluloses was higher than 0.03, the modified hemicelluloses with better quality of surface enhance.

Aramid paper was manufactured using poly (m-phenyleneisophthalamide) (PMIA) fibers and fibrids, and poly(ethylene oxide) (PEO) was used as dispersant to improve the uniformity of fiber distribution. The Paper Perfect Formation Analyzer (PPF) and the BFT-1 type β Formation tester were used to determine the formation of the aramid paper, and the relationship between the formation and the mechanical strength of aramid paper was discussed. Results showed that the tensile strength and tear strength of aramid paper before hot calendering is affected strongly by its grammage standard deviation, but is less affected by its formation nonuniformity as a function of the scale of foramtion, the R2 correlation between tensile strength and grammage standard deviation was 0.63, and the R2 correlation between tear strength and grammage standard deviation was 0.73. However, the nonuniformity of formation in the range of scale of formation 0.8-22.7mm has great influence on the tensile strength of aramid paper after hot calendering, and the R2 correlation between tensile strength and formation nonuniformity in this range of scale of formation was greater than 0.58.

The heat transfer printing is a new application of printing to textile industry. At present, there are no unified standards and parameters. In this paper, The parameters such as printing density, printing color gamut, the color efficiency of heat transfer printing papers and fabrics are tested. The evaluated printing quality parameters are put forward, therefore the reference standards are provided the reliable guidance for the heat transfer printing industry.

The focus of this study is to investigate the effect of carboxylated styrene-butadiene rubber (SBR) latex on the dynamic rheologcial properties of paper coating suspensions modified with nanosized particles. The elastic storage modulus G′ and the viscid loss modulus G′′ are used to evaluate the dynamic rheologcial properties of paper coating suspensions. The effects of different amount carboxylated styrene-butadiene rubber latex on the flow parameters of paper coating suspensions are comparatively presented. It is shown that the dynamic elastic storage modulus G′ and viscid loss modules G′′ of paper coating suspensions increase with the SBR content change from 13% to 18%. The dynamic rheologcial properties are related to the strength of the network structure of paper coating suspensions. It is also found that the elastic storage modulus G′ of paper coating suspensions is larger than viscid loss modulus G′′, which indicates that paper coating suspensions in this investigation all behave like a viscoelastic solid.

This paper deals with the preparation of Plate-shaped Calcium Carbonate and Its Application in the Paper Coating. calcium oxide and carbon dioxide were used as major materials to preparetion the Plate-shaped Calcium Carbonate, The best reaction conditions as follows: w(CaO)：w（H2O）=1：5, V（CO2）：V（atmosphere）=1：2. Then use the Plate-shaped Calcium Carbonate in spreading. The results show that the Plate-shaped Calcium Carbonate is a high-performance product that can obviously enhance the paper’s smoothness, whiteness, air permeability, printing ink absorbance.

The research reported here gives some new insights into the influence of lignin content on paper strength properties. The relative amount of total lignin in CTMP was varied by using multistage ClO2 bleaching method. Few differences were observed in fiber morphology charcteristics of CTMP during ClO2 treatments. Linear correlations greater than 99% were found between total lignin content and paper strength properties. The influences of lignin content on Scott bond and tensile strength were greater than that of tear and burst strength.

The glyoxalted polyacrylamide(GPAM) resins were obtained by cross-linking reaction between glyoxal and cationic polyacrylamide(CPAM) through aqueous solution copolymerization. The based CPAM was synthesized with acrylamide(AM) and diallyl dimethyl ammonium chloride(DADMAC) as raw materials by living free radical solution polymerization. Various synthesis conditions were discussed and the optimum conditions for copolymer’s synthesis were as follows: the amount of DADMAC 20%(wt), the charge of the initiator 0.5%(wt), the dosage of chain transfer agent(2-mercaptoethanol) 1.0%(wt), and the charge of crosslinking monomer 9.0%, the dosage of glyoxal 25%(wt), the pH value of the tertiary reaction 7.5-8.0 and the tertiary temperature about 65°C. The structure of the resulting product was characterized by FT-IR, 1H-NMR. Then the GPAM resins were used in the process of paper-making as wet-end additive, the results showed that the paper sheets can get a significant increase in strength properties from the added novel product.

The dynamic mechanical properties of PMIA-Pulp applied paper were investigated. At the same time, the dynamic mechanical properties of DuPont T410 paper were compared. Measurements of the dynamic mechanical properties were carried out on samples of low crystallinity and low orientation over a temperature range from 20°C to +500°C, at a frequency of 110 Hz, at a heating rate of 3°C/min. As the temperature from low to high, three different mechanical states with glassy state, rubber state and fluid state were appeared on DMA temperature curve, it responded the different mode of molecular motion. Storage modulus and glass transition peak of DuPont T410 paper were higher than the self-made applied paper. It means DuPont T410 Paper had a high resistance to external forces and deformation, as well as a good rigidity. Molecular chain freedom movement was difficult and the energy required to move relatively larger.

In this paper two types of oil-paper samples are thermally aged in two temperatures of 120. The samples are constituted by 25# oil, 45# oil and paper. Some aging indicators are measured during the aging process. Three parameters are measured during the aging process. The insulating ability of paper can be evaluated by water content and CO2/CO value. The model of functional relation for degree of polymerization (DP) with CO2/CO value, water content and service period are established by multiple linear regression analysis.

The properties of art paper and offset paper were measured, including whiteness, smoothness, gloss and absorbability. And these paper samples were printed using machine proofing with the uniform printing processes. Dot percentage and the tri-stimulus values (X, Y and Z) of dot areas and solid areas were tested with the spectrophotometer X-Rite 530 on the print paper samples. At last, dot gain curve and chromatic diagram were drawn after data analyzing and processing, and then the influences of paper properties on printing dot gain and gamut of color were analyzed. The results showed less dot gain value and greater gamut of color occurred because of higher smoothness, gloss, whiteness and lower absorbability to art paper when the printing conditions were definite, so the dot reproduction quality on the surface of art papers was better. But which of the above-mentioned were opposite to offset papers.

Five offset papers were applied to analyze the influences of the linting and picking problem based on the measurement of paper moisture, tightness, fiber composition and fiber length. The results showed that under the same conditions of paper making with the same raw materials, the printing surface strength increased and linting and picking problem reduced when the paper moisture or tightness are appropriately increased. The paper made with wood materials has a better surface strength and printability than bamboo and straw. The paper which contain less tiny fibers and long fibers, but more medium fibers is less likely to cause the problem of linting and picking.

A novel cationic waterborne epoxy emulsion for oil filter paper was synthesized. Hydrophilic groups were introduced into a multifunctional bisphenol-A novolac epoxy resin (NEP) by chemical modification, while maintaining the epoxy groups as many as possible, which were neutralized to form the equably water dispersed epoxy resin. The structure of modified NEP in different rate of ring-opening was characterized by Fourier Transform Infrared Spectroscopy (FTIR). The emulsion particle dispersion and micromorphology of waterborne bisphenol-A novolac epoxy resin (WNEP) was detected by granularity measured instrument and TEM. Mechanical properties and microstructure of oil filter papers impregnated by five different waterborne epoxy emulsions were tested and observed by SEM. From the results it can be shown that oil filter paper impregnated by WNEP emulsion has comprehensive properties better than other four commercialized products, exhibiting the best air permeability and improved bursting strength15% higher than that impregnated by poly-styrene-acrylate (PSA) latex.

Paper is the main print material, whose performance is a factor that effects the printing’s dot gain which is bad to image clarity and color reproduction. In the paper, Yule-Nielsen neugebauer spectral modal is analyzed , and the relation between paper’s spectral reflectance and the printing’s dot gain is discussed. By experiments, the paper’s spectral reflectance is adopted as correction index, which can reduce the dot gain value of the light color patch , and in the same printing conditions the dot gain is effected by the paper’s spectral reflectance, ink’s type, dot area percentage and wavelengths. The research has a certain significance for controlling printing quality and reducing the producing cost.

In order to improve the properties of mica paper, aramid fiber and PVA fiber were employed in mica paper as additive. Aramid fiber can act as skeleton and improve the dielectric strength of mica paper greatly accordingly at the optimum dosages of aramid fiber, 4%. When 3% of PVA fibers were added the tensile strength of mica paper increased significantly. It is because PVA fibers can smelt and act as bond for mica flake and aramid fiber under high temperature. The optimum beating degree of aramid fiber was 35 oSR, and the optimum drying temperature was 100°C. Compared with traditional mica paper, dielectric strength of composite mica paper with aramid fiber and PVA fiber increased above 25% and tensile strength increased 2.30 times under this optimum condition. In addition, the insulation performance of composite mica paper also improved substantially.

lightweight composite paper honeycomb core wallboard as green building materials and low carbon product of modern life, its lightweight and energy saving, environmental protection, easy construction which other wallboards can't reach, but in actual use, the residents reflects its sound insulation performance is not very well, The lightweight composite paper honeycomb core wallboardand is composite with two rigid panel and paper honeycomb core which is in the middle of the wallboard. However, at present, people rarely Study on Sound Insulation Property of lightweight composite paper honeycomb core wallboard, so take the lightweight composite paper honeycomb core wallboard as the research object, through several sets of Different Specifications wallboard of experiment test,, the results showed that:The sound isolation property of calcium silicate panel is better than Gesso panel’s. The thick panel’s sound isolation property is better than the thin one. At the same thickness, the more layers of paper honeycomb core, the better sound isolation effect. Increase the layer number of paper honeycomb core has remarkable effect on sound isolation property.

This paper presents a compound fuzzy control algorithm method having modifiable factors based on PLC, and the modified fuzzy controller and PI regulator is realized by PLC, the system solves problems of imprecise paper cutter speeds, instability, and paper cuttings of different lengths. The results show that the system can effectively restrain influences from pure time-delays while maintaining stability and strong robustness.

In order to predict and control the ink penetration depth, The base properties of 5 offset paper were firstly measured, namely, tightness、smoothness and K&N ink absorbency, etc. Then the penetration depth when offset magenta ink of the same volume entered into these papers was tested after printing. It was analyzed on the influences of offset paper and print processes on ink penetration depth. Finally, the relationships between the ink penetration depth under pressure and that under no pressure were studied. The results showed that both the tightness and smoothness of offset papers had impact on ink penetration into the paper internal structure, and the total ink penetration depth was about 1/5~1/3 of the thickness of the offset papers. In addition, the ink penetration depth under pressure was obviously lager than that under no pressure.

Gas diffusion layer is a very important component in fuel cell, and carbon fiber paper is widely used as substrate of gas diffusion layer. This paper has developed one way to produce carbon fiber paper from carbon fiber felt with or without pretreatment. The properties and microstructure of carbon fiber paper were also stdied. The results show that the pretreatment of carbon fiber felt is helpful to prepare carbon fiber paper with good properties. The content of carbon derived from resin during pretreatment has effects on density, thickness, porosity, gas permeability, porosity and tensile streagth of carbon fiber paper. Carbon fiber paper made from carbon fiber felt with pretreatment has better interface adhension than that of carbon fiber paper made from carbon fiber felt without pretreatment. Carbon fiber paper was produced with thickness of 0.28mm, density of 0.43g/cm3, porosity of 77%, gas permeability of 2500 mL•mm/(cm2•hr•mmAq), specific resistance of 0.017Ω•cm and tensile strength of 18MPa, which is a promising materials for fuel cell electrode.

We examined the molecular orientation of paper and mechanical properties of prepared paper yarn by twisting strips of paper made from various ratios of mulberry bast and Manila hemp. The molecular orientation of paper in direction of the strip was highest for paper with a mulberry bast weight ratio of 30 wt% as measured by a microwave molecular orientation analyzer. In contrast, the paper yarn sample with a mulberry bast weight ratio of 100 wt% showed a low molecular orientation of paper in direction of the strip. For mechanical properties, paper yarn with mulberry bast weight ratio of 30 wt% had the highest strength and Young’s modulus and the lowest elongation. These results show that the mechanical properties of the paper yarn depend on the molecular orientation of the paper in direction of strip.

Quaternary ammonium cationic surfactants have very important application in the papermaking industry, which is a series of important paper softening agents. In order to obtain an environment-friendly paper softening agent, a novel diester gemini quaternary ammonium salt cationic surfactant has been prepared. Dodecyldimethyl amine, epichlorohydrin and adipic acid were used as raw materials to synthesize the surfactant, and Fourier transform infrared spectroscopy was used to characterize the groups in reaction product. Moreover, the softening effect of the diester gemini quaternary ammonium salt cationic surfactant was studied in detail.

Hidden Markov model HMM (1) is one of the important approaches for information extraction. In this paper, a model of the improved first-order hidden Markov HMM (2) is proposed. In the HMM (2), the output probability of the observation is not only dependent on the current state of the model, but also dependent on the previous state of the current state of the model. The algorithm of the ML and the algorithm of the Viterbi are analyzed. At last, experiments show that the HMM (2) is more precise than the HMM (1).

The transfer paper used in novel silk transfer printing with reactive dyes was prepared by coating pastes. Water-soluble polyester named ES-1, carboxymethyl cellulose (CMC), alkali and hygroscopic agent were used according each function and mixed to prepare the pastes. The solid content of ES-1 and CMC in the pastes plays a crucial role in the face K/S value of prints. The color fastness of washing and rubbing for prints are above grade 4~5 and ES-1 is hardly adhered on printed fabrics.

The strapping machine for Paper Bills typically was designed to reduce labor intensity and enhance production automation level. The machines structure and working principle were described. There are three work posts in this equipment, they work continuously. This approach makes it very easy to split up a complex transformation into a series of simple transformations arranged in a loop line. The machine includes currency count/counterfeit distinguishing system, conveying system and strapping system. In the same time, the machine control system that adopts the PLC programmable controller can simplify the control system, and its reliability strengthens further. Practices show that the strapping machine has the advantages of simple structure, high efficiency, low cost and small vibrating noise.

Treated dredged sediment by using Hi Biah System (HBS) was used for the construction of five different artificial tidal flats (E1-E5) in Ago Bay, Japan. AGOCLEAN-P which is mainly made from paper sludge ashes was used as a coagulant and hardener. After the construction, continuous monitoring for the physico-chemical and biological parameters was carried out quarterly for 28 months from May 2005 to August 2007. Physico-chemical parameters measured were; particle size, loss on ignition (LOI), total organic carbon (TOC), chemical oxygen demand (COD), water content (WC), chlorophyll a, and acid volatile sulphide (AVS). At the end of the experiment, physico-chemical parameters for the artificial tidal flats along with the sandy natural flat (S2) were almost similar. In regards to the natural muddy flats (S1) the results showed remarkable increase in the particle size

A newly devised process using micro-electrochemical machining (MECE) is described as a recycling module in the current study. The purpose is the precise removal of In2O3SnO2 thin-film nanostructures from optical PET diaphragm surfaces for digital-paper surface. In the current experiment it was found that a large rotational diameter (Dc) for the cathode with a small gap width between the anode and the PET diaphragm surfaces was found to remove the In2O3SnO2 rapidly. A small edge radius of the cathode, or a short arc length of the anode, reduces the time taken for In2O3SnO2 removal. A high feed rate of the PET and adequate electrical power results in fast machining. Pulsed direct current improves dregs discharge and this is an advantage with a fast feed. A high electrode rotational speed also corresponds to faster removal of the In2O3SnO2 nanostructures. The development of the proposed precision production design is based on both technical and economic considerations.

Lots of unearthed objects and historical documents indicate the paper-making technology which had been invented in Western Han Dynasty moved to Japan through the Korean peninsula. This paper took the development of paper-making technology and how it spread to the major countries of East Asia as a clue to find out evidence of the early transmission of traditional handmade paper from the ancient literature, archaeological materials, research papers, and museum collections. Literature studies, field inspections and the traditional ways of recovery process were the main methods we used. After collecting and studying the materials, we drew the outline of the general picture of traditional handmade paper transmitting in the major countries of East Asia, and made a discussion about the relevant issues on the condition that the traditional handmade paper how to adapt to the geographical variation and the printing technology.

Four kinds of ink-jet papers with different surface characteristics are chosen in this paper, by the ink-jet proofing experiments, the influence of surface characteristics to dot gain is studied, and the law of dot gain with paper surface characteristics is discussed. During the experiment, surface properties including absorbency, gloss, roughness and whiteness are tested firstly; then, the standard wedge of GATF is printed on these papers in the same printing conditions; finally, the dot gain is tested by SpectroEye. After experimental data processing and analysis, dot gain curves of different ink-jet papers are concluded, the law of dot gain with ink-jet paper surface characteristics is summarized. The results show that dot gain is different in different paper, the evaluation of 3# is the best; dot gain is also different with different colors in the same paper, and it is serious in cyan but light in yellow; the biggest dot gain appears in different contrast with different colors, cyan appears near the 65% dot area. The result of this paper offers a certain theoretical reference and practical guidance to the selection, the research and development of ink-jet paper as well as the improvement of ink-jet qualities.

To prove the indentation quality of packaging products, the indentation depth and the bottom die width were changed to study the effect of the indentation on the indentation quality and make sure the best indentation depth with HANATEK indentation tester for 20kinds of paper. The relationship between the performance of paper and the best indentation depth is analyzed by the method of linear regression. The result shows that the deeper the indentation depth is, the bigger the folding angle is. The folding angle of steel wire and paper fibers in parallel rows is bigger than that in vertical rows. The deflection and longitudinal tensile strength of paper have notable effect on the indentation depth, transverse tensile strength and tightness are poor and the folding endurance has no remarkable influence.Printing packing profession in our country has made significant progress with the rapid growth of economy and the rapid expansion of international trade. The postpress technology plays a key role to the quality of printing packing and the die cutting indentation is the important technique of production. The die cutting indentation makes the print artistic and suitable , it suits all kinds of print surface finishing process and is widely applied in book cover, trademark, label, as well as carton. So how the quality of the die cutting indentation has directly effect on the market image. However, the indentation processing basically depends on the experience of technical staff in the factory at present. To study the relationship between the performance of paper and the indentation condition can provide certain scientific basis for the choice of indentation process.

In the offset process, ink penetration performance has extremely important influence on the quality of printed products. Ink penetration behavior and ink transfer volume on the offset paper surface were researched with the aid of IGT printability tester (AIC2-5) in the conditions of temperature 20±3°C and humidity of 60 ± 5%. Effect of different printing pressure and printing speed on the ink penetration depth was discussed, and at the same time, the depth was measured by GX71 Inverted Metallurgical Microscope. The results showed that, with the increasing of printing pressure, the changes of ink penetration depth and the ink transfer volume on offset paper surface were increased firstly and then decreased. When printing pressure was 400N, the ink penetration depth reached the maximum 71.67μm and the ink transfer volume reached the maximum too. With the enhancing of printing speed, ink penetration depth and ink transfer volume would be decreased gradually. The study also found that ink penetration behavior had certain influence on the ink color forming properties. For the offset paper used in this experiment, when ink penetration depth was 60.0μm~63.0μm, the print had high ink color intensity and color efficiency. When the ink penetration depth was too deep, ink color intensity and color efficiency was significantly reduced, while the color hue error would be increased, the print ink color turned shallow.

The goal of the work proposed in this dissertation is to develop a new method for the chrominance measurement and predict the spectral reflectance. Since the special feature of the holographic paper, it can reflect rainbow colors when it is in daylight, and the chrominance and the density of reflected light would change along with the observation angle changing, so when ink is printed, the chrominance and the quality of the products are difficult to detect. In this paper, we followed the convention of radiometry, derived the light distribution regular model of the interaction of light when it printed on holographic papers, and derived a new model to detect the chrominance information by changing the illumination condition. Finally, we established a spectral reflectance model by considering on the propagation of light.

Color management has been applied in the printing industry since 1993. Press papers as one of traditional substrates, its properties impact the quality of color reproductions. At present, almost all kinds of papers contain OBA. OBA works by absorbing ultraviolet wavelengths of the illuminant, emitting fluorescence at blue wavelengths, increasing the amount of light, and making the paper brighter. This effect of OBA is difficult to measure with common spectrophotometers accurately, which creates a mismatch between color proofing and printing. Furthermore, both the printing standards, as ISO 12647-2 defined substrate without fluorescence. It results in some problems in printing conformance using paper with OBA. This research discovered influence of OBA to color samples, derived colorimetric conversion method to correct and compensate the effects of OBA in papers, and demonstrated the efficient of the colorimetric conversion method in color management workflow with soft proofing.

In this paper, allyl maleated rosin ester was synthesized by the esterification of maleic rosin and allyl alcohol with catalyst. And then a new waterborne paper-plastic composite adhesive was prepared through the semi-continuous emulsion polymerization method with allyl maleated rosin ester, butyl acrylate, vinyl acetate and acrylic acid as raw materials. The product of esterification was analyzed by IR spectra, and its acid value was determined too. Polymer was analyzed by DSC and IR spectra and its T-style peel strength was determined. The adsorption effect of adhesives to ink was also tested. The results showed that this paper-plastic composite adhesive had good adhesive properties: excellent compatibility with the ink, longer stability period, and low cost.

Silicon oxide (SiOx) were deposited on many substrates such as silicon, glass, and poly (ethylene terephthalate) (PET) and widely used in industry due to their excellent impressive barrier, electrical, optical and eco-friendly properties. However, few publications that focus on paper as substrate in sputtering have been found. SiOx films were deposited on papers by radio frequency (RF) magnetron sputtering. The influences of process parameters, RF power density and deposition time on deposition rate, surface roughness, mechanical properties and humidity barrier of the films were investigated. The result from atomic force microscopy (AFM) applied to investigate the surface morphologies showed that papers being deposited SiOx (SiOx/Paper) films with the average roughness were much more homogenous and smoother than raw papers. Horizontal, vertical elastic modulus and yield strength of SiOx/Pap clearly increased. The water vapor transmission rate of SiOx/Paper films, which prepared at RF density of 2.78 W/cm2, argon (Ar) flux of 40 sccm and deposition time of 36 min decreased 15times, and the oxygen transmission rate did 10 times. Additional investigations regarding printability focusing on the color reproduction properties were also carried out.

Effects of ultrasonic on properties of modified soybean protein adhesives for duplex paper were investigated in this paper. The results showed that the treatment temperature had the greatest impact on adhesion strength among all factors. Optimum conditions were obtained by orthogonal experiment as follows: modified temperature 60°C, concentration of urea 5 mol/L , content of protein 14% , reaction time 3 h and ultrasonic time 20min. At the optimized conditions, the adhesion strength of soybean proteins was 0.79MPa.

Carbon fiber paper was modified by adding carbon nanotubes to make it reach the demand of gas diffusion layer (GDL) by the process of impregnation with phenolic resin solution dispersed with carbon nanotubes, molding, and carbonization. The properties of modified carbon fiber paper, thickness, density, porosity, gas permeability, specific resistance and tensile strength, were characterized. The results indicate that surface treatment is helpful to disperse carbon nanotubes in phenolic resin. Phenolic resin is used to bond the carbon fibers, and carbon nanotube could reduce the specific resistance of the carbon fiber paper. When carbon nanotube content is 5 %, modified carbon fiber paper is prepared with thickness of 0.30 mm, density of 0.43 g/cm3, porosity of 77 %, gas permeability of 2400 mL•mm/(cm2•h•mmAq), specific resistance of 0.020 Ω•cm and tensile strength of 15 MPa, which basically qualifies for the application requirement.

Paper surface efficiency (PSE), a paper property integrating gloss and absorbency, can be used to evaluate color reproduction after the interaction of paper and ink. But it was shown that the color reproduction was still related to paper whiteness in practice. So it is important to amend the PSE formula. In this paper, an assumed PSE formula which integrates gloss, whiteness and ink absorbency is firstly presented, and according to experimental data, it can be well forecasted that the change of these principal paper properties would affect color reproduction result via the new PSE formula. The data connection between the assumed and new PSE formula and ink color reproduction based the description of photo-density measurement and chromatic one was studied subsequently. The results showed that photo-density measurement was simpler and more practical than chromatic measurement.

The precision of transferring paper is key factors to decide the print overprint accuracy, and vibration has an important impact on paper transferring accuracy. Empirical mode decomposition (EMD) can be used to extract the features of vibration test signal. According to the intrinsic mode function (IMF) by extracted, it is useful to analyze the dynamic characteristics of swing gripper arm on motion state. Due to the actual conditions of printing, the vibration signal of Paper-Transferring mechanism system is complex quasi periodic signals. Hilbert-Huang marginal spectrum that is based on empirical mode decomposition can solve the problem which is modals leakage by FFT calculated in frequency domain. Through the experimental research, the phase information of impact load at the moment of grippers opening or closing, which can be used for the optimization design of Paper-Transferring system and the improvement in the accuracy of swing gripper arm.