Search

The nickel base alloy IN718 was manufactured by Laser Powder Bed Fusion (LPBF) using a laser spot size of 1024 μm and a laser power of 1.3 kW at a layer thickness of 160μm. The resulting porosity, microstructure and mechanical properties are presented. Very coarse and in build direction elongated grains are stacked to form a polycrystalline material with sharp single-crystal-like texture. The appearance of ∑5 grain boundaries between coincidence side lattices is recognized. Tensile testing shows highly anisotropic mechanical properties according to the revealed texture. Increasing the hatch distance reduces the severity of the texture.

To study the process conditions for preparing aspirin β-cyclodextrin inclusion.Method: Choose the usage ration of aspirin with β-cyclodextrin and the time of reaction as the main factors, and use the inclusion yield as evaluated indicators and the process condition to conduct orthogonal experiment Optimization Pack aspirin.Outcome: The optimum inclusion process condition: molar ratio of the aspirin with β-cyclodextrin is 1:3, inclusion time is 60 minutes.Conclusion: The process condition of using β-cyclodextrin inclusion to inconcluse aspirin is feasible, effective, and of applicative value.

To study the process conditions for preparing sultamicillin tosilate β-cyclodextrin inclusion.Method: Choose the usage ration of sultamicillin tosilate with β-cyclodextrin, the inclusion temperature and the time of reaction as the main factors, and use the inclusion yield as evaluated indicators and the process condition to conduct the L9 (34) orthogonal experiment Optimization Pack sultamicillin tosilate.Outcome: The optimum inclusion process condition: molar ratio of the sultamicillin tosilate with β-cyclodextrin is 1:8, inclusion temperature is 47°C, inclusion time is 40 minutes.Conclusion: The process condition of using β-cyclodextrin inclusion to inconcluse sultamicillin tosilate is feasible, effective, and of applicative value.

A flame-retardant polyester fabric was obtained by eco-friendly water-based polyurethane adhesive for coating, which was made of waterborne polyurethane and several flame retardants. It was found that the combination of Doher6206 and MCA is an effective flame retardant. The concentrations of the combination and polyurethane as well as the process conditions were optimized. The optimize result was gained while the cure temperature was 150°C, cure time was 3 min, coating width was 0.1mm and coating rate was 4.15 m/min. Because of the good performance in flame-retardant and eco-friendly, the flame-resistant polyester fabric has the potential to be used in the inner decoration of the car and the plane, curtain, and the inhibitor of baby car and so on.

The study is focused on the extracting polysaccharide from Dendrocalamus latiflorus with assisted enzyme and cool water to maintain its biological activity. The optimized conditions for the cellulase process are listed as follows The enzymatic hydrolysis temperature stays 50°C. The mass fraction of cellulase (MFC) is 0.4% on the basis of the mass of dry leaves. The volume of water added in is 20mL on the basis of the mass of dry leaves and the pH value of buffer solution remains 4.6. Under these conditions, the ratio of polysaccharides (RP) can be 0.92% after two extractions for 180min in total and its RP is 12.05% higher than the traditional process.

This document demonstrates how to affect the brightness of liquid package recycled pulp by hydrogen peroxide bleaching and FAS beaching. The optimum H2O2 bleaching process conditions: 8% H2O2, 4% NaOH, bleaching temperature 80 °C, bleaching time 1.5h. The best FAS bleaching conditions was FAS dosage of 0.5%, NaOH dosage of 0.25%, bleaching temperature at 80 °C, time for 30min. And bleaching had no adverse effect on the performance of bleached pulp fiber.

In this paper, soy protein papermaking process conditions as dry strength agents were studied. The results show that a part of the three parts of soy protein and a mixed system with a cationic starch alone, or cationic starch, soy protein, as compared to dry strength additives will significantly increase the strength. The optimum conditions were: pulp types E, defatted soy protein, dry vacuum drying method is 105°C, adding ways to add the pulp, the best reaction time was 10min, the optimum dosage of 2%. Soy protein sources are widely readily available, and environmentally friendly and easily biodegradable, paper dry strength agents as a good material.

combined with walnut, wood grain, wood rough but uniform wood muscles, the stiffness of the medium density, bending strength and fracture strength is moderate, low rigidity, bending performance of steam., sapwood heartwood distinguish slightly obviously narrow wooden materials used in the field of integrated timber adhesive demand for experiment.This topic using room temperature fast curing of the modified vinyl acetate as integrated timber adhesive glue agent.And through the orthogonal test design, by changing the different pressure, time, dosage of curing agent, 9 groups of specimens was produced three factors, the determination of the compression shear strength, and an analysis to the walnut integrated timber pressure shear strength of the primary and secondary relations of influence: time st13 dosage of MDI st13 pressure.Experiments show that the optimum process conditions of walnut line, time is 2 h, pressure of 3 mpa, MDI dosage was 20%.Under the condition of the preparation of the line, good bonding and resistance to water, accord with national standard LY/T 1601-2002 to the requirement of integrated timber structure.

A mathematical model to describe the pressure distribution in a thermoset large-sized composite rod as it travels through the pultrusion die is developed on the basis of Darcy’s law. A finite-difference method is employed to solve the governing equations of three-dimensional axis-symmetric cylindrical die geometry. The influence of pre-heating on pressure rise inside a cylindrical die inlet is investigated. The present model may be utilized to obtain the optimal linear taper angle for die inlet and process conditions to achieve maximum possible pressure rise in the die inlet.

In order to study the states of oxide layer under different pre-dressing process conditions in ultrasonic vibration and electrolytic in-process dressing combined grinding. The effects of electrical parameters, wheel speed, ultrasonic vibration on the oxide layer are investigated with indicators of oxide layer surface morphology and thickness characteristics. The results indicate that the oxide layer thickness increases with the decrease of inter-electrode gap and the increase of duty ratio with pre-dressing time. The effect of ultrasonic vibration cause thinning of the oxide layer. Oxide layer surface morphology allowing processing requirements are obtained by duty cycle of 5μs: 5μs, electrode gap of 0.3mm, wheel speed of 3200 r/min.

The quaternary ammonium heteropolyphosphatetungstate compound is proved as a promising catalyst to accelerate the synthesis of epoxidized soybean oil (ESO). As to enhance the efficiency of the catalyst, this paper investigated the process of regeneration of deactivated catalyst (DC) from reaction system of ESO. The single factor experiments were carried out to optimize the regeneration conditions and the optimize process conditions were as follows: acid solution at pH 3, m (deactivated catalyst):m (H2O2):m (H3PO4):m (cetylpyridiniumammonium chloride)=10:5:1:1,and stirred via mechanical and ultrasound agitation . Under above conditions, the epoxy value (≥6.0 %) of ESO which were catalyzed by generated catalyst and yield (≥92 %) were achieved.The results indicate that the activity of regenerated catalysts remain the same as that of the fresh catalysts and certify the economic feasibility of the process.

The spent copper chromium oxide catalyst of furfural hydrogenation was recycled.by ammonia leaching method. This method not only has the characteristics of simple process, low cost, quick effect, but also avoids the use of various oxidants increasing the security of the experimental operation and the generation of carcinogen hexavalent chromium.The experimental results show that the optimum process conditions of ammonia leaching is: the concentration of ammonia 15mol / L, the leaching temperature is at 180 °C, leaching time for 4h, the optimal dosage of (NH4)2SO40.6g/10g. The copper leaching rate can reach more than 80% of the maximum.

The use of short process chains for the realization of complex and high performance components is a reasonable approach to achieve sustainable products and to reduce energy consumption. In the Collaborative Research Center SFB/TR TRR30 which is supported by the German Research Foundation DFG this approach is investigated applying thermo-mechanically forming processes. In this way, combining hot metal forming and heat treatment steps in a single process, tailored materials properties together with appropriate geometries are achieved [1, 2] . However, still additional machining operations, e. g. turning operations in case of shafts, are needed to achieve proper workpiece finish. Due to locally varying mechanical properties, undesired changings of the process conditions occur, leading to varying surface and subsurface properties, e.g. the residual stress state. It is well known that residual stresses have a major impact on the components properties during service [3]. In this paper, a survey is given about near surface residual stress states after exterior dry turning of differently heat treated cylindrical workpieces made of steel AISI 6150.

The development of standard simple of tin bronze for casting is presented,design of composition, selection melting temperature 1150 °C, put into 0.2m3/kg argon gas, stirring with 100rpm for 1min, keeping temperature for 30min as the optimum process conditions, coarse and fine tests of homogeneity with data analyses, determination of standard values and standard deviation. The homogeneity and standard values of samples meet the national standard GB/T15000 and YS/T409-1998. The standard sample series has ratification as National Reference Materials (GSB 04-2707-2011) by National Technical Commission on Reference Materials.

Al-5Ti-1C master alloy refiner was prepared by melt reaction method, and its refining efficiency was examined by purity aluminum in the paper. The microstructures under different process conditions were studied by OM, SEM and XRD. The results shown that the grains were finer, TiAl3 and TiC phases were uniformly distributed at 900¡æ, held time for 15min. The refining efficiency was best at addition of 0.4% (wt.%) refiner and held time for 10min.

In the CFRP integrated manufacturing process based on RFI process, a CFRP stacking sheet is fabricated by laying alternatively Carbon Fiber Fabrics on Epoxy Resin Films each other. So its infusion process can be regarded as a concurrent infusion system consisting of some representative infusion systems with the delay time. Where, each representative infusion system includes a single layer resin film and a single layer carbon fiber fabric. It means that the infusion behavior of a CFRP stacking sheet can be described as a combination of the time delay from the bottom layer to the top layer and the required infusion time of the top representative infusion system. Based on this idea, the infusion behavior of the CFRP stacking sheets with different infusion pressures and the number of layer of Carbon Fiber Fabric is researched with the aid of the simulation software of RFI process developed especially and experiments, whose objects is to discover the impacts of the number of layer of Carbon Fiber Fabric and the infusion pressure on the resin infusion behavior. It is noticed that the predicted results have a good agreement with the experimental ones, which also verifies the applied method in this paper is feasible and valid to determine proper process conditions of the CFRP integrated manufacturing process.

It is a kind of high efficiency and energy saving new method to prepare high purity magnesium oxide (MgO) with magnesium carbonate tri-hydrate (MgCO3·3H2O) as intermediate. Our research group had already designed orthogonal experimental and got the optimal process conditions of MgCO3·3H2O. The operating parameters such as temperature, pH and reaction time had been further optimized in this paper. Intermediate MgCO3·3H2O with high aspect ratio and good settling performance was synthesized at the optimal temperature 40-50°C,the optimal pH 8.8-9.0, the optimal reaction time70min, the optimal condition also applied to brine system.

A response surface methodology (RSM) was used for the determination of optimum coagulation process conditions for disperse navy blue dye wastewater treatment. The experimental design was Box-Behnken design (BBD) with three operational variables: coagulant dosage, pH value and settling time. The influence of these three independent variables on the chroma removal was evaluated using a second-order polynomial multiple regression model. Quadratic model was predicted for the response variable and the maximum model-predicted chroma removal efficiency was 95%. Based on surface and contour plots, the optimum conditions were obtained to be coagulant dosage of 70.98 mg/L, pH value of 7.46, and settling time of 15.80 min with the actual chroma removal efficiency as 93%.

Stiffness is a very important property of automobile panel, especially for high-strength thinning sheet due to personnel security and energy conservation on auto industry. It is difficult to study because of the complexity streamline feature of auto body. An experiment method for determining stiffness was presented. The experiment study models of which based on the hyperboloid shallow shells that could represent automobile panel’s surface features was established. The criterion and research technique of automobile panel stiffness were introduced. The experiment research works of effects of two main process conditions on stiffness which blank holding force (BHF) and boundary condition during the stiffness test were obtained. All conclusions provided a particularly effective process guidance and technical approach in the automobile panel production.

Polycarboxylic acid anti-crease finishing agent is used to finish silk. The optimal finishing process was selected through orthogonal experiment. The optimal process conditions were as follows. The optimal concentration of both finishing agent Y and magnesium chloride was 100g/L. The optimal baking temperature and baking time were 160 °C and 3min, respectively. The results show that the silk fabrics treated by finishing agent Y had high strength retention and washing fastness. In addition, the effect of ant-crease finishing on the whiteness of fabrics was small.

Metal micro forming is microscale effect in the process of classification and evaluation, for the correct understanding of micro forming and conventional forming difference, it is guiding significance in the course of micro forming technology similar to conventional forming which is applied to the data and experience. The microscale effect is beneficial to accurate grasp of all kinds of microscale effect in the forming reasonable classification and evaluation.Change law of microscale affects the nature of knowledge for the right team which provides effective quantitative data, when determine the major hours of rights, it also can provide the guiding idea for material selection and process optimization.The reasonable classification and evaluation of microscale effect is the experience that conventional forming calculation provides a reality way. In all kinds of process load calculation, as long as the material intrinsic microscale is joined, microscale can be introduced in corresponding few and the process conditions.

Flotation experimental research is carried out on a certain oxidised copper ores in Huidong, Sichuan province. The ores belongs to the typical oxidised ores. For the characteristics of the mine and the scene of the test requirements, five different flowsheets were test. Under the proper process conditions, the good technical indexes were obtained in all flowsheets. But the the fourth flotation flowsheet was choosed. The principle process of two roughing, one scavenging and two cleaning were used in flotation process. Both the scavenging foam and tailing of first cleaning are returned to the first roughing work and tailing of second cleaning is returned to first cleaning work in closed circuit.

Developing the interior structures of polymer films is essential for creating novel functions of such films. This study investigates the effects of extension parameters and processing procedures on the super-structure of a polypropylene (PP) film. An biaxial extension device is also designed and fabricated to analyze the effects of annealing, extension temperature, extension rate and other parameters on the super-structures of PP films. Based on super-structure analyses, the relationships between extension parameters and film structures are determined, and an extension process that involves a second time stretching procedure is suggested. Experimental results indicate that void structures can be generated by biaxial extension at the interface between the crystalline and amorphous regions in a film. The mechanical strength of the film is also affected by stretching and become highly oriented. Although a low extension temperature can increase the number of void structures generated at a low extension ratio, structure sizes are dispersed. Additionally, voids with uniform size can be obtained when the film is stretched at a high temperature; however, it needs a high extension ratio to promote the formation of void structures. As for annealing treatment, when the annealing temperature increased, the size and quantity of the spherulites that were formed in films by annealing also increased, but these films tend to have similar sizes and numbers of void structures. Based on the experimental results, this study also describes how parameters influence the void structures of a PP film created during the extension process. Analysis results further demonstrate how extension parameters and processing procedures can be adjusted to improve the fabrication of PP films.

To study optimum inclusion process conditions for essential oil from perilla and Pericarpium Citri Reticulatae in Baokening granule,the utilization ratio of volatile and the inclusion rate were determined to evaluate process conditions, and the condition was optimized with orthogonal design by the liquid-phase method in aqueous solution. The experiment results showed that the optimum preparation conditions for inclusion were established as: oil: ß-CD was 1:8, and ratio of amount of water to ß –CD was 10. The inclusion temperature and time were at 40°C and for 180 min. The yield is high in such optimum process condition and the inclusion effect is good.

As a kind of promising lightweight material, CFRP (Carbon Fiber Reinforcement Polymers) have been widely concerned in automobile industry in last decades. In the present work, series of experiments are conducted to investigate the impact of key process conditions, including the cutting edge geometry, curing process and cutting manner, on the CFRP cross-sections quality by cutting at resin infiltration during implementing the CFRP parts integrated manufacturing processes based on RFI process. For the typical cross-section defect such as the debunching of carbon fiber, chippings of carbon fiber and resin salivation, authors explain why that happens and propose the corresponding suppressing measures. Research results show that, under the existing experimental conditions, the optimal process scheme is to combine the large arc edge with curing before punch returns back and press cutting to obtain the desired CFRP cross-sections.

The aluminum salt flame retardants powders are prepared with ammonia and aluminum chloride hexahydrate by chemical precipitation method under different conditions. The effect of the reaction temperature, ammonia concentration and aluminum ion concentration on the particle diameter are systematically studied. In addition, the effects of additions on the particles diameter of aluminum salt flame retardants are also explored by adding different additions in the experiments. On the basis of the experimental results, the process conditions synthesizing the minimum particle diameters are obtained, which may provide the beneficial reference for inorganic flame retardant powders.

The experimental results for manufacturing ceramics from industrial boron carbide powder with 10 wt% of ultradispersed fraction of a powder of the same composition by spark plasma sintering have been presented. Under optimal process conditions such sintering results in a decrease of the sintering temperature and synthesis time, and the addition of ultradispersed fraction increases microhardness and fracture toughness of the ceramics.

the landfill leachate was disposed by Catalytic Wet Air Oxidation (CWAO) method, and the monitoring indexes include CODCr, decolorization and pH. The results showed that the CODCr removal rate and the decolorization rate of landfill leachate increased with the increase of reaction temperature and reaction pressure. However, they first rose then reduced with the increase of catalyst dosage. Under the condition of the catalyst concentration 300 mg/L of Co (NO3)2, at the reaction pressure of 3.5 MPa and the reaction temperature of 180 °C, the CODCr removal rate and the decolorization rate reached 56.8% and 83.7%, respectively, and pH was 8.45 at the reaction time of 90 min.

[ObjectivTo study the extraction technology of flavonoids from orange peel in order to provide some theoretical guidance for the industrial production of flavonoids from orange peel. [Metho Taking orange peel as raw material, which was citrus fruit processing waste and the flavonoid yield as index, with ultrasonic assisted extraction, through single factor experiments and orthogonal tests to optimization of the extraction technology, obtain optimum process conditions of orange flavonoid by ultrasonic assisted extraction. [Result As for ultrasonic assisted extraction, the yield of orange flavonoid reached 9.6% under extraction conditions of extracting time 30 min, alcohol concentration 60%, sedimentation ratio 1:25.

Pure silk has good luster and biological compatibility , but its conductivity is very poor; CNT(carbon nanotubes) is good at adsorbing and has good conductivity. Therefore, with CNT modifying silk fabric, silk fabric properties could be improved. In this paper, the CNT was purified and modified with acid, and the silk fabric was modified with CNT which was treated. And it studied the effects of solution’s pH, the concentration of CNT, reaction time, reaction temperature and bath ratio on modification.The best process conditions of the study was determined by the results of gain rate of weight and K/S value,namely: the solution pH is 4, the weight of CNT is 0.06 g, the reaction time is 90 minutes, the reaction temperature is 95 °C and reaction of bath ratio is 1:200. Under this condition, the conductivity performance of the sample, is best.

The present study aimed at investigating the preparing nanotitania by sol-gel method and nanoFe-TiO2 oxidation system for the treatment of oily wastewater. Reaction conditions were optimized concerning TiO2 type, the dosage of Fe-TiO2 and pH. The efficiency of oil removal and COD removal were ascertained and optimum process conditions for stable and effective operation were determined. Under the optimum conditions of Fe-TiO2 1 g/L and pH 6.0, the process of UV/Fe-TiO2 achieved removal efficiencies of oil and COD as 98.1% and 98.5%, respectively. Thus, this technique could be used as a treatment for oily wastewater.

Extracting flavone from bamboo leaves by ultrasonic, the flavonoid extraction conditions was optimized by single factor experiment and orthogonal experiment design, and the traditional heat reflux method was compared. The results showed that: the optimum process conditions of ultrasonic wave extraction of flavonoids from bamboo leaves were ethanol concentration of 70%, solid to liquid ratio of 1:20, extracting 20 min in 60 °C. Under this condition, extraction content of total flavonoids was up to 4.538 mg.g-1. And ultrasonic assisted extraction was superior to hot reflux extraction.

Separating the influence of relative density and cell diameter on the tensile properties is very important to the theory research on mechanic properties of microcellular foamed materials. In this article, differences of the influences of relative density and cell diameter on the tensile properties are identified by the foaming PS in constrained mold. The effects of relative density and foaming process conditions such as foaming temperature, foaming time and saturated pressure on the tensile strength and Youngs modulus are analyzed. The results show that relative density is the only structural variable of Youngs modulus and Youngs modulus is not relative to cell diameter. Youngs modulus is in proportion to relative density. Tensile stress of microcellular PS is in contrast to cell diameter, decreases with increasing foaming time and foaming temperature and increases with saturated pressure.

The exploratory experiments of precipitating vanadium which simulated the process conditions in a vanadium plant with the indexes of vanadium loss and the cost were tested with industrial sulfuric acid and flue-gas sulfuric acid in laboratory, respectively. The technology optimizations were studied by selecting the experimental group with the lowest vanadium loss and cost. The results indicate that the vanadium loss and cost are the lowest by one-step vanadium precipitation with flue-gas sulfuric acid, and the optimum processes are as follows: the pH of solution is adjusted to 2.2 after adding the vanadium precipitation agent; the precipitation is proceeded 1 hour at 99°C or 100°C. The vanadium loss and cost per 1000 kg V2O3 are respectively 3.06 kg and 763.18 yuan by the optimum processes, which are much less than the processes with industrial sulfuric acid.

Chemical bath deposited ZnS thin films are promising buffer layers for thin film solar cells, replacing the environmentally hostile CdS buffer layers currently in use. Reflection, absorption and scattering are the three main light loss mechanisms in buffer layers. In this work, improved process conditions, such as magnetic stirring and air annealing, are used in the chemical bath deposition of ZnS thin films to optimize their surface morphology, which effectively reduces light scattering and increases the transmittance, resulting much better ZnS thin films.

The synthesis of hexafluoropropylene oxide in fixed-bed reactor using HFP as raw materials and molecular oxygen as oxidant is studied in the present paper. The selectivity of HFPO on the Ag/γ-Al2O3 catalyst prepared by impregnation can get 41.8%. The influence of the Ag/γ-Al2O3 catalyst modified by impregnation-sedimentation method and first group metal salts on synthesis reaction was investigated, as well as process conditions.

Effects of inoculation quantity, culture temperature and time on glucoamylase activity and the optimum conditions of koji-making of Aspergillus oryzae was studied by using single factor and response surface experiment. The results show that 3 factors can significantly impact on glucoamylase activity of koji. The best process condition of koji-making obtained by using the "Design-Expert" software is: culture temperature 38.70 °C, inoculation quantity 0.85 , and culture time 50.47 h.

Photocatalyst of Fe-Sm-Yb modified TiO2 loaded on clay brick was prepared for degradation of NH3-N in coking water. The influence factors of NH3-N degradation rates were discussed by single factor experiment and orthogonal experiment. The optimum process conditions of photocatalytic degradation NH3-N in coking water were confirmed. The results show that NH3-N degradation rates 82.23% were highest in the conditions of pH 6.5, photocatalyst charge of 1.4 g, illumination for 6h, reaction at 55°C, calcination at 500°C.

This paper is considering the surface quality control of hot-rolled coil. Through analyzing patterns, distributing-regularities and components of surface defect of low-carbon coil of WISCO, got the conclusion that mould powder entrapment was the key factor that lead the defect’s occurrence. Based on discussing the mechanism of powder entrapment in mould, developed a type of high viscosity powder, optimized flow field of mould through modifying the structure of SEN, and improved other relevant process conditions, the incidence rate of this type of defect was under controlled effectively and the degradation rate of the coil caused by the defect dropped from about 4 percent to less than 0.2 percent at the end.

The absorption separation method is often applied to recover the gasoline vapor. Several absorbents with good performance, such as dioctyl phthalate, dinonyl phthalate, squalane and AbsFOV-II, were selected to absorb the gasoline vapor from the vapor-air mixture. Based on the simulation software Aspen Plus, the absorption effect of the absorbents on the vapor was evaluated, and some key factors such as the plate number of the absorption tower, the temperature of the absorbents, and the liquid-gas ratio were considered and simulated for the gasoline vapor absorption. The simulation results showed that AbsFOV-II was the most effective absorbent, and the optimized process conditions for the gasoline vapor absorption were as follows: the tower plate number, the absorbent temperature and the liquid-gas ratio were 10, 15 °C and 70 L/m3, respectively, and then the absorption efficiency can be access to 97.5%. The simulation results can provide some guidance for the improvement and optimization of the vapor absorption process.

It has been proved that chitin content in Antarctic krill is much higher than other marine shelled organisms; therefore, people pay much more attention to the extraction and application of the chitin in Antarctic krill. During the experiments which use the traditional acid and alkali method to extract the chitin from Antarctic krill, the chitin’s extraction efficiency was found out to have a great influence on the degree of grinding the shell. After testing and then come to a conclusion that based on the chitin content: extraction efficiency, concentration and dosage of the acid and alkali as well as many other factors, the material’s fineness should be within forty mesh. And the optimum process conditions are: alkali treatment: concentration 25%, solid-liquid ratio 1:10, temperature 95°C, 2 hours; acid treatment: concentration 10%, solid-liquid ratio 1:10, temperature 60°C, 2 hours. By this way, 94.254% high-purity chitin was produced.

With the rapid development of stationery industry, it is very important to improve the pass yield of manufacturing of pencil sharpener, a kind of traditional stationery products. The current situation of manufacturing process of 0645 pencil sharpener was investigated first. The goal of quality analysis and improvement was set. The causes that affect the main quality characteristic index were analyzed by the cause and effect diagram, and the main causes were confirmed. Design of Experiment (DOE) technology was used to find out the best process conditions. Then countermeasures were made according to the main causes. After checking the improving effect, It is found that the pass yield of the manufacturing of 0645 sharpener has increased from 89.1% to 95.2%.

Novel preparation methods for preparing (hydroxy modified) PBI monofilament fiber and PBI resin are investigated and developed by the co-polycondensation of new AA-monomer 1,2,4,5-tetraaminobenzene tetrahydrochloride (TAB•4HCl) respectively with BB type monomers 2,5-dihydroxyterephthalic acid (2,5-DHTA), hydroxyterephthalic acid (HTA) and terephthalic acid (TPA). Effects of process conditions (monomer concentration, P2O5content, temperature and polymerization time) on polymerization and fiber spinnability are studied systematically.

The dyeing behavior of dew-retted linen fabrics modified with urea was analyzed. The effects of processing conditions, such as concentration of urea, modification time, and modification temperature on the dyeing performance of dew-retted linen were investigated. The surface morphology of linen fiber was observed by stereoscopic microscope. The breaking strength of linen fabrics was measured by fabric strength tester. The k/s value was tested by spectrophotometer. The results show that, the dyeing performance of the modified linen was greatly improved, but its breaking strength was decreased and the morphology of linen fiber became roughly. Meanwhile, the optimal process conditions were obtained, i.e. the concentration of urea was 150 g/L, the modification temperature at 160°C, and modification time for 6 min.

In this paper, the porous superfine-denier Nylon 6 FDY(22dtex/35f) was successfully manufactured by blending Nylon 6 chips with a compound masterbatch according to a certain proportion through adjusting the process conditions on high speed spinning machine. The influence of masterbatch’s content and spinning technologies on the properties of FDY fibers with porous superfine-denier is also particularly discussed. And finally we find out the best spinning techniques for Nylon 6 FDY fiber with porous superfine-denier.

The single-phase Υ-AlON powders were synthesized from three different precursors: Υ-Al2O3+C, Al(OH)3+C, NH4Al(OH)2CO3+C at 1750°C by carbothermal reduction and nitridation . The effects of aluminium source and synthetic process conditions on the characteristic of Υ-AlON powders were investigated in order to optimize the preparation method. It was revealed that the wet chemical processing was helpful to reduce partical size. The median particle sizes (d50) of AlON powders synthesized from different precusors were 15.33 μm, 2.886 μm, 405.6 nm, respectively.

In order to study the relations between process conditions and the productivity of ferrate, study on direct electrochemical preparation of ferrate by plate diaphragm electrolytic cell was investigated in this paper. The main factors such as electrolytic time, electrolyte concentration, electrolytic temperature and electrode interval were analyzed, respectively. The optimum conditions were confirmed: concentration of electrolyte in 16mol/L to 18mol/L, electrolytic time of 3 hours, electrolytic temperature of 40°C, and electrode interval of 2cm. The results could provide technical parameters and a theoretical guide to the industrial production of ferrate.

Sugarcane bagasses were used as raw materials to produce the hemicelluloses, and the effects of temperature, alkali consumption, time and liquid to solid ratio on the extraction yield of hemicelluloses were investigated. Through the analysis of the response surface method, results were concluded that the best extraction process conditions were as follows: NaOH concentration 10.60%, extraction time 4.34 h, solid-liquid ratio 1:40.59, actual extraction rate is 31.486%, corresponding to the model prediction 31.4447% basically.

It is time-consuming to dry the caffeine colloid got from caffeine methylation liquid after evaporating crystallization and cooling crystallization. To solve this problem, the laboratory equipment is designed to simulate vacuum rotating dryer to dry the caffeine colloid. Through the single-factor experiment and orthogonal experiment, the suitable dry conditions are determined as follows: the heating temperature is 110 °C; the vacuum degree is 0.09 MPa; the stirring speed is 250 rpm. The drying time under the optimal process conditions is reduced to 1.01hours.

This experiment was to develop a new kind of chewable tablet with white ginseng and blueberry. Firstly,get ginseng extracts from selective white ginseng by ultrasonic and freeze drying, and get blueberry juice powder from blueberries by squeezing and spray drying. Secondly, these two kinds of powder were pressed into tablets with starch, xylitol, etc as the auxiliary materials, and 40% alcohol as wetting agents. The optimum process conditions and formula were determined by single factor and orthogonal tests. The results show that the content of ginseng extracts, blueberry juice powder, starch, and 40% of ethanol should be 15%, 35%, 20%, 40% respectively in the best formula.