Edge Blunting of Hard Alloy Cutter Blade for Cutting Chemical Fibers

Through the establishment mathematical model and experimental verification, the course of blunting of hard alloy cutter blade for cutting chemical fiber have been studied. The result shows that the cutter blade sharpness would be greatly reduced in the course of fiber cutting as the initial edge radius and edge angle, the linear wear, and the notch depth of cutter blade are increased. The blunting of cutter blade in the course of fiber cutting can be divided into four stages. The reducing degree of the sharpness is different in different stages. The linear wear of cutter blade is almost negligible. The blunting of the cutter blade is directly related to the depth of notches generated on the cutting edge. The deeper the notch, the more the cutter blade sharpness would be decreased.

15th China’s International Chemical Fiber Conference Ended in Hangzhou

The 15th China’s International Chemical Fiber Conference was held at Hangzhou, Zhejiang Province on June 10th-12th, 2009. The theme of the conference is "Financial Crisis and Chemical Fiber Industry". Hundreds of delegates

Technology Development Road for Chemical Fiber Industry in China (Part One)

Speech given by Mr. Zheng Zhiyi, President of China Chemical Fiber Association, at the 13th China International MMF Conference (Ke Qiao 2007)

Operation of China's Chemical Fiber Industry 2005

Under the pressure of the lasting-high prices of world oil and raw materials of chemical fiber, the increasingly serious environment of international textile trade, and the fluctuation of RMB exchange rate, China’s chemical fiber industry suffered some embarrassments in the first half year of 2005, but redeveloped in the other half.

The Helmsman of the “Chemical Fiber Carrier” Interview with Chen Jianhua

In a gathering,some so-called successful businessmen are talking happily.Among them is a famous chemical fiber manufacturer Chen Jianhua.Chen recalled his past in his memoir "My Endeavor"-"I was born in a remote town Shengze in 1971, suffering an impoverished life when I was very young.My family is hard to afford tuition fee when I was a pupil,…."But a hero is known in the time of misfortune,Chen owns a total asset of 13 billion Yuan at this moment with his unremitting efforts year by year,mastering a kingdom of chemical fiber-Hengli Group..As an old saying goes "Suffering is wealth",the early experience steeled Chen,endowing the wealth and fortitude to him. After skimming over Chen's memoir,I continued a further face to face interview with him in order to understand his course of struggle more deeply.All the success have their own highlights in their characters,therefore,we cannot make an exception of Chen's case.

Status quo of the chemical fiber industry,1-9,2017

From January to September,2017,the operation of the chemical fiber industry continued to keep an upward situation.As the textile industry got warmer,the demand of the chemical fiber industry had significant improvement.The entire operation rate of the industry has improved from that of the same period in the previous year.It was not slack in the chemical fiber market even in off seasons.In the third quarter。

Financial Crisis 2008 Impact on China Chemical Fiber Industry

On Jun. 10-12, 2009, The 15th China’s International Chemical Fiber Conference, with the theme of "Financial Crisis and Chemical Fiber Industry", was held at Hangzhou, Zhejiang Province. During the conference, the China Chemical Fiber Association released a speech on "The Impact of Global Financial Crisis on China Chemical Fiber Industry and Response Strategies". Here in the following part, we will focus on the part of the impact of financial crisis on Chinese chemical fiber industry. In our next issue, we will go on with the part of Response Strategies.

The Impact of Global Financial Crisis on China Chemical Fiber Industry and Response Strategies (Part Ⅱ)

Prospects of Global Financial Crisis and Economic Crisis The widely spreading global financial crisis has halted the fast growth of world economy in five consecutive years,and heavily stricken the financial and economic sectors worldwide.It’s second only to the "Great Depression" in the 1930’s.Governments

Toxic Gas Put 161 Workers of Jilin Chemical Fiber Plant in Hospital

A news briefing held on May 13 by local government in Jilin city of Jilin province released that 161 workers got sick symptoms as a result of their contact with an unidentified gas emitting from Jilin Chemical Fiber Group Corp.

A Case Study of Search Engine on World Wide Web for Chemical Fiber Engineering

Search engine is an effective approach to promote the service quality of the World Wide Web. On terms of the analysis of search engines at home and abroad, the developing principle of search engines is given according to the requirement of Web information for chemical fiber engineering. The implementation method for the communication and dynamic refreshment of information on home page of the search engines are elaborated by using programming technology of Active Server Page 3.0 (ASP3.0). The query of chemical fiber information and automatic linking of chemical fiber Web sites can be easily realized by the developed search engine under Internet environment according to users' requirement.

The Application of Air-flow to the Technological Process of Chemical Fiber

The air-flow’s states and ways acted on the technological process of chemical fiber are summed up, which includes chip drying, spinning quenching as well as airjet texturing (air texturing, tangling texturing and bulked continuous filament (BCF)),and the effect of air-flow on the process and quality of chemical fiber is studied,and the action of mechanics and heat on the bulked continuous filament are calculated.

The 12th Asia Chemical Fiber Industries Federation Conference 2019 showed you the report of Asian chemical fiber industry

On April 11th, the 12th Asian Chemical Fiber Conference, the high-est-level professional meeting of the Asian chemical fibre industry, was held in Bali, Indonesia. The theme of the conference was “Sustainable development of chemical fibers”. It was represented by chemical fibre associations from nine countries and regions in China, India, Indonesia, Japan, Korea, Malaysia, Pakistan, Taiwan China and Thailand attended the meeting.

Some indicators of the chemical fiber industry recovery in H1 of 2020

In the second quarter,with the gradual improvement of the domestic pandemic,the process of resuming production of chemical fiber enterprises accelerated,and the demand in the textile terminal market has rebounded.The decline in major operating indicators such as production,investment and quality efficiency of the chemical fiber industry has been significantly narrower than that from January to March.However,due to the spread of the pandemic abroad,China’s chemical fiber import and export volume have declined significantly,especially the export volume of major products have turned from a positive growth in January to March to a negative growth.International oil prices began to fluctuate upwards after the plunge in April,which supported the cost of chemical fiber products to a certain extent.However,insufficient demand was still the biggest problem faced by the chemical fiber industry in the first half of the year.

Functional Optical Fiber Sensors Detecting Imperceptible Physical/Chemical Changes for Smart Batteries

The battery technology progress has been a contradictory process in which performance improvement and hidden risks coexist.Now the battery is still a“black box”,thus requiring a deep understanding of its internal state.The battery should“sense its internal physical/chemical conditions”,which puts strict requirements on embedded sensing parts.This paper summarizes the application of advanced optical fiber sensors in lithium-ion batteries and energy storage technologies that may be mass deployed,focuses on the insights of advanced optical fiber sensors into the processes of one-dimensional nano-micro-level battery material structural phase transition,electrolyte degradation,electrode-electrolyte interface dynamics to three-dimensional macro-safety evolution.The paper contributes to understanding how to use optical fiber sensors to achieve“real”and“embedded”monitoring.Through the inherent advantages of the advanced optical fiber sensor,it helps clarify the battery internal state and reaction mechanism,aiding in the establishment of more detailed models.These advancements can promote the development of smart batteries,with significant importance lying in essentially promoting the improvement of system consistency.Furthermore,with the help of smart batteries in the future,the importance of consistency can be weakened or even eliminated.The application of advanced optical fiber sensors helps comprehensively improve the battery quality,reliability,and life.

Long-term In Vivo Monitoring of Chemicals with Fiber Sensors

Long-term in vivo monitoring of chemicals with implanted sensors has received considerable interests over the past decades owing to their significant contributions in reflecting health conditions and assistance in diagnosing diseases.However,the widely explored chemical sensors outside the body fail to meet the requirements of in vivo applications.This perspective reviews main challenges,recent advances and future directions of long-term in vivo monitoring of chemicals,related to immune response and sensing performance.Challenges in terms of the immune response caused by unstable interfaces between sensors and tissues and improper implanting methods,and the insufficient performance of chemical sensors in complex physiological environment are discussed.Therewith,recent advances in fabricating biocompatible,flexible and thin sensors,developing effective implanting methods with reduced injury and improving the sensitivity,selectivity and stability of chemical sensors for accurate monitoring in vivo are summarized.Finally,we propose the future directions to address these challenges by fiber chemical sensors through the combination of soft fiber configuration,facile implanting methods and new recognition elements,which will provide new platforms for health monitoring and physiological mechanism revealing.

Effect of chemical vapor infiltration treatment on the wave-absorbing performance of carbon fiber/cement composites

Short carbon fibers were treated at high temperatures around 1100℃ through chemical vapor infiltration technology. A thinner layer ofpyrocarbon was deposited on the fiber surface. The dispersion of carbon fibers in a cement matrix and the mechanical properties of carbon fiber/cement composites were investigated by scanning electron microscopy （SEM） and other tests. The reflec- tivity of electromagnetic waves by the composites was measured in the frequency range of 8.0-18 GHz for different carbon fiber contents of 0.2wt%, 0.4wt%, 0.6wt%, and 1.0wt%. The results show that the reflectivity tends to increase with the increase of fiber content above 0.4wt%. The minimum reflectivity is -19.3 dB and the composites exhibit wave-absorbing performances. After pyrocarbon is deposited on the fiber, all the refiectivity data are far greater. They are all above -10 dB and display mainly wave-reflecting performances.

Effect of Shrinkage Reducing Agent and Steel Fiber on the Fluidity and Cracking Performance of Ultra-High Performance Concrete

Due to the low water-cement ratio of ultra-high-performance concrete(UHPC),fluidity and shrinkage cracking are key aspects determining the performance and durability of this type of concrete.In this study,the effects of different types of cementitious materials,chemical shrinkage-reducing agents(SRA)and steel fiber(SF)were assessed.Compared with M2-UHPC and M3-UHPC,M1-UHPC was found to have better fluidity and shrinkage cracking performance.Moreover,different SRA incorporation methods,dosage and different SF types and aspect ratios were implemented.The incorporation of SRA and SF led to a decrease in the fluidity of UHPC.SRA internal content of 1%(NSRA-1%),SRA external content of 1%(WSRA-1%),STS-0.22 and STE-0.7 decreased the fluidity of UHPC by 3.3%,8.3%,9.2%and 25%,respectively.However,SRA and SF improved the UHPC shrinkage cracking performance.NSRA-1%and STE-0.7 reduced the shrinkage value of UHPC by 40%and 60%,respectively,and increased the crack resistance by 338%and 175%,respectively.In addition,the addition of SF was observed to make the microstructure of UHPC more compact,and the compressive strength and flexural strength of 28 d were increased by 26.9%and 19.9%,respectively.

Oxidation Modification of Polyacrylonitrile-Based Carbon Fiber and Its Electro-Chemical Performance as Marine Electrode for Electric Field Test

A novel sensor for ocean electric field testing has been fabricated by polyacrylonitrile-based on carbon fibers with electro-chemical oxidation.The surface profile characteristics of the carbon fibers were characterized by scanning electron microscope,Fourier transform infrared spectra and contact angle.Cyclic voltammetry and Tafel curves have been used to study its electro-chemical performances.Two identical electrodes in sea water as the electric field sensor will swiftly respond to applied electric field which causes positive and negative ions to move in opposite direction,resulting in a electric potential difference(ΔE).Test result indicates that the offset potential is typically below 1 m V with a drift of 60-170μVd^-1.Typical self noise level is 1.07 nV√Hz^(1/2)@1 Hz.The electric field response indicates that the modified electrode pair shows better response to AC sine signal of amplitude and frequency(5 mV and 1 mHz)respectively than its blank.The electric field response model of the modified electrodes is creatively presented according to its electric double layer capacitance and Faraday pseudo-capacitance.Many advantages of the carbon fiber electric field electrode will make it have potential application prospect.

Optimization and Characterization of Combined Degumming Process of Typha angustata L. Stem Fibers

Plant derived natural fibers have been widely investigated as alternatives to synthetic fibers in reinforcing polymers.Researchers over the years have explored many plant fibers using different extraction processes to study their physical,chemical,and mechanical properties.In this context,the present study relates to the extraction,characterization,and optimization of Typha angustata L.stem fibers.For this purpose,desirability functions and response surface methodology were applied to simultaneously optimize the diameter(D),linear density(LD);yield(Y),lignin fraction(L),and tenacity(T)of Typha stem fibers.Typha stems have been subjected to both alkali(NaOH)and enzymatic(pectinex ultra-SPL)treatments.Three levels of process variables including enzyme concentration(10,15,and 20 ml/L)and treatment duration(10,15,and 20 days)were used to design the experiments according to the factorial design.Experimental results were examined by analysis of variance and fitted to second order polynomial model using multiple regression analysis.The Derringer’s desirability function released that the values of process variables generating optimized diameter,linear density,yield,lignin ratio and tenacity are 20 ml/L and 20 days for concentration of pectinex ultra-SPL enzyme and treatment duration,respectively.Confirmation was performed and high degree of correlation was found between the experimental and statistical values.Moreover,the morphological structure has been investigated by the scanning electron microscope,showing a crenelated structure of ultimate fiber bundles of cellulose composing the Typha fiber.Compared to Typha stem non-treated fibers(TSNTF),Typha stem combined treated fibers(TSCTF),brings to improve mechanical properties.This change in mechanical properties is affected by modifying the fiber structure showing alpha cellulose of(66.86%)and lignin ratio of(10.83%)with a crystallinity index of(58.47%).