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

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.

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.

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.

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。

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.

Effects of DPC on Agronomic Traits and Economic Characters of Machine-Harvested Cotton in the Yellow River Valley of China and Chemical Control Techniques

[Objective] The aim was to investigate the effects of DPC chemical controlling technique on agronomic traits, yield and quality of machine-harvested cotton in the Yellow River Valley of China, and clarify the reasonable control period and the application amount of DPC. [Method] The new machine-harvested cotton variety Hengmian HD008 was used as the test material, and 3 different DPC treatments were set. [Result] DPC significantly reduced plant height and branch length, reduced branch angle and leaf area, so the rational control can effectively shape the ideal plant type of machine-harvested cotton. DPC had significant effects on yield and yield components, and the proper amount of DPC could increase the number of bolls during hot days, the number bolls in autumn and the total number of bolls. It increased the boll weight and seed index, but decreased lint percentage decreased, and proper amount of DPC could increase the yield. DPC significantly increased the specific breaking strength of fibers, and proper control could improve the uniformity of fibers, but other indexes had no significant influence. [Conclusion] According to the requirements of machine harvest to the agronomic traits of cotton and the growth characteristics of cotton plant, chemical control could begin after floral bud emergence in cotton about every 10 d, and the spraying amount can be controlled according to the growth amount of the main stem. The daily growth amount of plant height should be controlled at 1.5-1.8 cm, and the plant height should be within 75-90 cm.

Theoretical Optimization of the Production of Heating Layers Using Local Wool Fibers

Science is the basis of the country’s development and wealth. In particular, it is necessary to effectively use advanced scientific developments and technical achievements in order to strengthen the economy in the period when the desire for innovation in all fields is still growing. In theoretical-experimental Scientific Research work, both theoretical and experimental results are achieved, and it is more useful to withstand more theoretical-experimental loads for a longer period of time. The occurrences in the production process of natural wool fiber technologists are a complex of physical and mechanical phenomena, which can be used only by the modern achievements of science and technology. In most cases, the parameter relationship with the factors influencing the technological process or the object can open a curve without any other things.

An Edge-Fog-Cloud Computing-Based Digital Twin Model for Prognostics Health Management of Process Manufacturing Systems

The prognostics health management(PHM)fromthe systematic viewis critical to the healthy continuous operation of processmanufacturing systems(PMS),with different kinds of dynamic interference events.This paper proposes a three leveled digital twinmodel for the systematic PHMof PMSs.The unit-leveled digital twinmodel of each basic device unit of PMSs is constructed based on edge computing,which can provide real-time monitoring and analysis of the device status.The station-leveled digital twin models in the PMSs are designed to optimize and control the process parameters,which are deployed for the manufacturing execution on the fog server.The shop-leveled digital twin maintenancemodel is designed for production planning,which gives production instructions fromthe private industrial cloud server.To cope with the dynamic disturbances of a PMS,a big data-driven framework is proposed to control the three-level digital twin models,which contains indicator prediction,influence evaluation,and decisionmaking.Finally,a case study with a real chemical fiber system is introduced to illustrate the effectiveness of the digital twin model with edge-fog-cloud computing for the systematic PHM of PMSs.The result demonstrates that the three-leveled digital twin model for the systematic PHM in PMSs works well in the system’s respects.

Few-layer MoS2 grown by chemical vapor deposition as a passive Q-switcher for tunable erbium-doped fiber lasers

We report an erbium-doped fiber laser passively Q-switched by a few-layer molybdenum disulfide（MoS2） saturable absorber（SA）.The few-layer MoS2 is grown by the chemical vapor deposition method and transferred onto the end-face of a fiber connector to form a fiber-compatible MoS2 SA.The laser cavity is constructed by using a three-port optical circulator and a fiber Bragg grating（FBG） as the two end-mirrors.Stable Q-switched pulses are obtained with a pulse duration of 1.92 μs at 1560.5 nm.By increasing the pump power from 42 to 204 mW,the pulse repetition rate can be widely changed from 28.6 to 114.8 kHz.Passive Q-switching operations with discrete lasing wavelengths ranging from 1529.8 to 1570.1 nm are also investigated by using FBGs with different central wavelengths.This work demonstrates that few-layer MoS2 can serve as a promising SA for wideband-tunable Q-switching laser operation.

Polarization-locked VCSEL with PM fiber pigtail for quantum communication

Quantum communication is a new technology requiring a stable and reliable laser source for communication security. A new kind of polarization-locked vertical-cavity surface-emitting laser （VCSEL） with polarization maintaining （PM） fiber pigtail is fabricated as a decoy state laser source. The VCSEL is packaged in a standard butterfly box integrated with thermoelectric coder （TEC） and thermistor. The optical pulse width of full-width at half-maximum （FWHM） is smaller than 400 ps with a 100-MHz on/off modulation frequency. The results reveal that modulation range is better than 4. Moreover, the polarization is stable, and the power extinction ratio is larger than 25. The center wavelength is 850 nm, and the SMSR is better than 40 dB.