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Register a new userStudy of correlation between length and micornair of syrian cotton fibers with mechanical propeties of produced ring carded yarns by using statistical analyses method
دراسة العلاقة بين كل من طول و نعومة ألياف القطن السوري مع المواصفات الميكانيكية للخيوط الحلقية المسرحة المنتجة منها باستخدام أسلوب التحليل الإحصائي
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تعتبر المواصفات الميكانيكية للغزول من أهم البارامترات من وجهة نظر الجودة و تعتمدُ بشكل كبير على طول الليف و قيمة النعومة ، اللذين يعتبران البارامترات النوعية الرئيسية لاختيار المادة الخام . و بما أن الانتفاع الأفضل من المادة الأولية لتصنيع النوعية الأمثل للغزل أصبح أمر حتمي لمعامل الغزل لمواجهة المنافسة العالمية ، لذلك كان الغرض من هذه الدراسة بحث تأثير القطن الذي يَختلف بطول الليف و قيمة النعومة على المواصفات الميكانيكية للغزل مما يساهم في تحديد الاستخدام الأمثل للمادة الخام . تم من خلال هذا البحث الحصول على المعادلات الرياضية التي تربط مواصفات الألياف (نعومة_طول) بالتوصيف الميكانيكي للخيوط (قوة_استطالة) .
the best utilization of raw material for manufacturing the optimum quality of yarn has become inevitable for the spinning mills to face the global competition. mechanical properties of yarn are of the most important properties from quality point of view and largely depend upon the fiber length and micronair value ; which are considered the foremost quality parameters for the selection of raw material . it is the purpose of this study to investigate the effect of cottons differing fiber length and micronair value on mechanical propeties of yarn so as to contribute in determining the optimum using of the raw material .
References used
Cotton: Science and technology ; S. Gordon and Y-L. Hsieh ; WOODHEAD PUBLISHING LIMITED ; Cambridge, England
Textile Terms and Definitions, The Textile Institute, Manchester, 5th edition, 1963
(ASTM D1440, Standard Test Method for Length and Length Distribution of Cotton Fibers (Array Method
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This experimental study aims to improve the quality of carded web
on advanced carding machine in Syrian spinning society.
The Effect of Speed of card on the web quality Statistically
analysed, the data indicate that all main parameters studied hav
e an
influence on web quality.
Furthermore it has been shown that there is a strong correlation
between the incident of neps and the increasing in the short fiber
content during increasing speed carding
Subsequently increase speed of card hasan effect negative on
Mechanical properties that are usualy the major contributer on the
yarn quality and its commercial value.
We have done many counts, strength and twist tests - which are considered the most important physical properties that determine yarns quality specification - on cotton yarns at the industrial researches& tests center. The researcher has depended on t
his tests results to find out formulas which match between physical properties of yarns, starting from common formulas then he has proved them by analysis of results that we got from graphic tests instruments, then we have figured out proportion constants between these physical properties from curves that we have got by tests results exemplification and we have shown if these constants describe common constants or new constants.
In this research a proper amount solvent has been for Neoprene
rubber to give it the required viscosity. Zinc oxide has also been
added with different ratios to improve the process of adhesion. We
made compound substances on the basis of Neoprene
and
improved them with glass fibers by means of different ways of
solidification, and with different weight ratios by means of manual
molding through designing a wooden mould containing five parts
with certain measurements, and studying the orientation of these
fibers and their effects on some mechanical characteristics of
Neoprene rubber.
The aim of this research is to study the Syrian Cotton types:Raqqa ٥, Deir
ez Zor ٢٢, Aleppo ٣٣-١,Aleppo ٤٠, Aleppo ٩٠, by determining the contents of
α - cellulose, β - cellulose ,γ – cellulose, polymerization degree (P) and the ash
ratio.
Machine developing aimsto improve its velocity, capability and production,this is
accompanied by increase of Mechanical side effects and the dynamical loads between the
Machines elements and parts, that may conduct to rise the Mechanical vibrations
and may
cause a lot of damage in these machines, and cause negative effects on the
environmentaround these machines, the study of Mechanical vibrations has a significant
importance for engineering and technical students, to have knowledge of Mechanical
vibrations that may arise in the machines under design process, or to study the mechanical
vibrations resulting in the machines under use to isolate these vibrations and attenuate of
its negative effects, for that we introduced an simulation program to show and illustrate a
method to simulate some mathematical models representing some of possible types of
vibrations, and to determine the most important parameters that describe the different
vibrations motions, we choose an suitable programing language to merge this simulated
models with an illustration and learning texts and drawings and animations in one
executable application, this application show the models and the results in simple and very
clear manner, and show the results in high resolution comparing with other programing
languages.
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