scholarly journals Analysis of fiber structure and properties of drawn fibers prepared by cold drawing in ethanol and subsequent hot drawing

2020 ◽  
Author(s):  
Go Dongwoo ◽  
Takarada Wataru ◽  
Aneja Arun ◽  
Kikutani Takeshi
Keyword(s):  
Cold Drawing ◽  
Structure And Properties ◽  
Fiber Structure ◽  
Hot Drawing

Properties of Flame-Retardant Cellulose Fibers Prepared from Cellulose[Amim]Cl Dope Solution

2011 ◽  
Vol 236-238 ◽  
pp. 1152-1155
Author(s):  
Lei Gao ◽  
Bo Wen Cheng ◽  
Jun Song ◽  
Zeng Geng Guo ◽  
Fei Lu ◽  
...  
Keyword(s):  
Flame Retardant ◽  
Flame Retardants ◽  
Simultaneous Thermal Analysis ◽  
Cellulose Fiber ◽  
Cellulose Fibers ◽  
Structure And Properties ◽  
Fiber Structure ◽  
Fiber Degradation ◽  
Dope Solution ◽  
Flame Retardant Properties

This paper has studied the structure and flame-retardant properties of flame-retardant cellulose fiber with DDPSN as flame retardant. The flame retardants was uniformly dispersed in the cellulose /[Amim]Cl Solution to obtain the good spinnable dope, then the dope was wet-spun. Effects of the flame-retardant contention the fiber structure and properties were investigated. The surface of the flame-retardant cellulose fiber was observed using field emission scanning electron microscope (FESEM). Besides, through the Simultaneous thermal analysis, it has been shown that, with the increase of fame retardant, the degree of fame resistance was obviously improved. The flame retardant acted greatly in condensed phase during the fiber degradation and remained mainly in residues after degradation, the experiments show that the flame-retardant properties of flame-retardant cellulose fiber with 20wt% DDPSN was obvious.

Drawing Thin-Walled Tubing With a Moving Mandrel Through a Single Stationary Die

1944 ◽  
Vol 11 (4) ◽  
pp. A199-A210
Author(s):  
G. Sachs ◽  
J. D. Lubahn ◽  
D. P. Tracy
Keyword(s):  
Flow Stress ◽  
Cold Working ◽  
Fundamental Equation ◽  
Strain Curve ◽  
Cold Drawing ◽  
Stress Strain Curve ◽  
Hot Drawing ◽  
Thin Walled ◽  
Fundamental Equations ◽  
Algebraic Solutions

Abstract The fundamental equations for the drawing of tubing with a moving mandrel have been solved for the simplified cases of both cold-drawing and hot-drawing of thin-walled tubing through a stationary die. For the solution of the fundamental equation, a method of successive improvement can be used for any contour of the tools and any shape of the stress-strain curve. Algebraic solutions were developed for tapered tools and for a metal exhibiting a constant flow stress in cold-working, and for a metal with the flow stress depending exponentially upon the strain rate in hot-working. The effects of the die and punch contours and the friction coefficients between the metal and the die and punch, respectively, on the stresses in the metal, the draw forces, and the limits of drawing were determined. The calculations reveal that, with a small die angle and high friction on the mandrel, the process resembles extrusion rather than drawing, the limit being determined by the strength of the die rather than by the tensile strength of the metal.

Influence of Solvent Content on Properties of UHMWPA6 Fibers Prepared by Gel-Spinning Method

2014 ◽  
Vol 941-944 ◽  
pp. 1264-1268
Author(s):  
Hui Min Zhang ◽  
Li Zhang ◽  
Qing Xiu Jia
Keyword(s):  
Mechanical Property ◽  
Thermal Property ◽  
Relative Viscosity ◽  
Polyamide 6 ◽  
Structure And Properties ◽  
Fiber Structure ◽  
Gel Spinning ◽  
Solvent Content ◽  
Complex Agent ◽  
Influence Of Solvent

Polyamide 6 (PA6) gels were prepared by dissolving PA6 powder with relative viscosity 25.85 in formic acid using CaCl2 as complex agent. Concentration of the polymer was 18 (w/v) %. And then, polyamide 6 (PA6) fibers were obtained through gel-spinning. In this study, the effects of solvent content on fiber structure and properties were investigated. The results showed that with the increasing of solvent content, significant changes occurred in the crystalline structure and thermal property of fibers. The optimum solvent content of fibers with the highest mechanical property in this study was 9.4%.

The effect of extraction condition on gel spun super denier PVA fiber structure and properties

e-Polymers ◽  
2009 ◽  
Vol 9 (1) ◽  
Author(s):  
Xia Yumin ◽  
Wang Zhixin ◽  
Tang Huigong
Keyword(s):  
Mechanical Properties ◽  
Structure And Properties ◽  
Fiber Structure ◽  
Extraction Condition ◽  
Gel Spinning ◽  
Solvent Content ◽  
Optimum Parameters ◽  
Pva Fiber

AbstractThis paper is directed towards PVA monofilament with good mechanical properties and super denier, which was produced with the gel spinning technique, first used by K. YAMAURA, used to strengthen the concrete. The structure and properties of PVA fiber were affected especially by extraction conditions, including the temperature, the solvent content and the duration of the extraction, all of which were studied and the optimum parameters were selected.

Formation of Structure and Properties of Low-Carbon Steel Under Rolling with Shear and Cold Drawing

2013 ◽  
Vol 16 (1) ◽  
pp. 26-32
Author(s):  
E. Pashinska ◽  
V. Varyukhin ◽  
M. Myshlaev ◽  
A. Zavdoveev
Keyword(s):  
Carbon Steel ◽  
Low Carbon Steel ◽  
Cold Drawing ◽  
Structure And Properties ◽  
Low Carbon
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