scholarly journals تأثير اختلاف معامل برم الخيوط الصوفية الممشطة على بعض الخواص الاستعمالية لأقمشة الورستد المنسوجة = The Effect of Different Twist Factor of Worsted Wool Yarns on Some Performance Properties of Woven Worsted Fabrics

2018 ◽  
Vol N.A. (10 Part 2) ◽  
pp. 354-372
Author(s):  
ضياء الدين مصطفى عبده البنا
Keyword(s):  
Performance Properties ◽  
Twist Factor

scholarly journals Hybrid monomer design for unifying conflicting polymerizability, recyclability, and performance properties

Chem ◽  
2021 ◽  
Vol 7 (3) ◽  
pp. 670-685
Author(s):  
Changxia Shi ◽  
Zi-Chen Li ◽  
Lucia Caporaso ◽  
Luigi Cavallo ◽  
Laura Falivene ◽  
...  
Keyword(s):  
Performance Properties ◽  
And Performance

scholarly journals Correlations between the Type of Aggregates in the Bulk Phase and the Functionality and Safety of All-Purpose Cleaners

2021 ◽  
Vol 22 (12) ◽  
pp. 6592
Author(s):  
Artur Seweryn ◽  
Tomasz Wasilewski ◽  
Anita Bocho-Janiszewska
Keyword(s):  
Sodium Chloride ◽  
Magnesium Chloride ◽  
Foam Stability ◽  
Bulk Phase ◽  
Magnesium Salt ◽  
Foaming Properties ◽  
Performance Properties ◽  
Salt Addition ◽  
And Performance ◽  
The Given

The article shows that the type and concentration of inorganic salt can be translated into the structure of the bulk phase and the performance properties of ecological all-purpose cleaners (APC). A base APC formulation was developed. Thereafter, two types of salt (sodium chloride and magnesium chloride) were added at various concentrations to obtain different structures in the bulk phase. The salt addition resulted in the formation of spherical micelles and—upon addition of more electrolyte—of aggregates having a lamellar structure. The formulations had constant viscosities (ab. 500 mPa·s), comparable to those of commercial products. Essential physical-chemical and performance properties of the four formulations varying in salt types and concentrations were evaluated. It was found that the addition of magnesium salt resulted in more favorable characteristics due to the surface activity of the formulations, which translated into adequately high wettability of the investigated hydrophobic surfaces, and their ability to emulsify fat. A decreasing relationship was observed in foaming properties: higher salt concentrations lead to worse foaming properties and foam stability of the solutions. For the magnesium chloride composition, the effect was significantly more pronounced, as compared to the sodium chloride-based formulations. As far as safety of use is concerned, the formulations in which magnesium salt was used caused a much lesser irritation compared with the other investigated formulations. The zein value was observed to decrease with increasing concentrations of the given type of salt in the composition.

Effect of Mineral Fillers on the Polyurethane Foam Performance Properties

2019 ◽  
Vol 974 ◽  
pp. 267-272
Author(s):  
Ludmila A. Suleymanova ◽  
Inna A. Pogorelova ◽  
Andrey V. Kocherzhenko ◽  
Igor S. Ryabchevsky
Keyword(s):  
Polyurethane Foam ◽  
Industrial Waste ◽  
Clay Loam ◽  
Performance Properties ◽  
Foam Filling ◽  
Processing Plants ◽  
Improved Performance ◽  
Mineral Fillers ◽  
First Time ◽  
Ferruginous Quartzites

The authors investigated the possibility of increasing the basic operational properties of polyurethane foam by introducing such mineral fillers as clay, loam, sand, and others, including man-made ones. For the first time polyurethane foam filling with industrial waste from mining and processing plants, in particular, wet magnetic separation of ferruginous quartzites (hereinafter - tailings) was proposed. The resulting insulating composites with improved performance properties will expand the use range of the material in construction.

Optimization of Drafting Conditions in the Break Drafting Zone Additional Pressure Bar on INA-V Spinning Frame

2014 ◽  
Vol 936 ◽  
pp. 1825-1829
Author(s):  
Qing Guo Feng ◽  
Jia Zhi Ren ◽  
Yi Feng Zhang
Keyword(s):  
Process Parameters ◽  
Ratio Increase ◽  
Additional Pressure ◽  
Yarn Quality ◽  
Twist Factor ◽  
Pressure Bar

To improve the yarn quality, the pressure bar was installed in the break drafting zone of the INA-V spinning frame. The process parameters were optimized in the break drafting zone with pressure bar of the INA-V spinning frame, the drafting principle in the break drafting zone with pressure bar of INA-V spinning frame was analyzed, and the sliver configuration was observed in the break drafting zone with pressure bar. The result revealed that installed the pressure bar in break drafting zone after, when the roving twist factor was small, CV%, thinness, thickness and neps of the yarn spun decrease as the break drafting ratio increase; when the twist factor of roving was larger, the break draft ratio as 1.3 time was optimum drafting conditions. The yarn quality was improved as roving twist increased.

scholarly journals Improved Compressor Maps Using Approximate Solutions to the Moore-Greitzer Model

2009 ◽  
Author(s):  
Chris Drummond ◽  
Craig R. Davison
Keyword(s):  
Data Collection ◽  
Approximate Solutions ◽  
Sufficient Accuracy ◽  
Small Data ◽  
Performance Properties ◽  
General Performance ◽  
Data Collection Process ◽  
Smoothing Process ◽  
Expert Input ◽  
Fine Tune

Producing compressor maps is time consuming, costly and error prone and many data samples must be collected to give sufficient accuracy. Even then, expert input is typically required to fine tune the map to the appropriate shape. In this paper, we take some of that expertise and incorporate it in the smoothing process. The main piece of knowledge used is the cubic approximation for speed lines derived from the Moore Greitzer model. This well accepted approximation captures much of the general performance properties of compressors. But it is also widely recognized as only being very roughly true of real compressors. Nevertheless, we show that embedding this approximation, however limited, in the smoothing process results in accurate interpolation and extrapolation. The aim of this work is to substantially reduce the need for human input in the fitting process. We also anticipate a number of other benefits: less data is needed, with the commensurate time and money saved; the data collection process can be monitored for possible problems; changes in the map can be quantified and, when sufficiently small, data collection can be terminated.

Quantitative 3D measurement of the nanostructural features that dictate mesoscale performance properties of nanocomposites

2009 ◽  
Vol 31 (9) ◽  
pp. 1495-1503 ◽  
Author(s):  
M. Mahboob ◽  
C. Kagarise ◽  
K.W. Koelling ◽  
S.E. Bechtel
Keyword(s):  
3D Measurement ◽  
Performance Properties
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