On-line density and crystallinity of polyethylene terephthalate during melt spinning

1998 ◽  
Vol 38 (12) ◽  
pp. 1959-1968 ◽  
Author(s):  
Vishal Bansal ◽  
Robert L. Shambaugh
Keyword(s):  
Polyethylene Terephthalate ◽  
Melt Spinning ◽  
Line Density ◽  
On Line

Studies and research concerning BNFP on-line density measurement

1981 ◽  
Author(s):  
J E Shiley ◽  
L G Jordan ◽  
G A Huff
Keyword(s):  
Density Measurement ◽  
Line Density ◽  
On Line

Preparation and properties of bottle-recycled polyethylene terephthalate (PET) filaments

2018 ◽  
Vol 89 (7) ◽  
pp. 1207-1214 ◽  
Author(s):  
Zhaohui Jiang ◽  
Zengge Guo ◽  
Zhanqi Zhang ◽  
Yuanzhang Qi ◽  
Congcong Pu ◽  
...  
Keyword(s):  
Polyethylene Terephthalate ◽  
Melt Spinning ◽  
Diameter Distribution ◽  
Morphological Observation ◽  
Scanning Calorimetry ◽  
Cross Sectional ◽  
Recycled Polyethylene ◽  
Degree Of Orientation ◽  
Pet Fibers ◽  
Spinning Speed

Bottle-recycled polyethylene terephthalate (R-PET) fibers were fabricated by the melt spinning method. Based on characteristics of R-PET chips, this study involved a primary exploration of the spinning parameters, including spinning temperature, spinning speed and spinneret plate. The properties of R-PET and original PET (O-PET) fibers were compared using scanning electron microscopy (SEM), tensile testing, sonic orientation, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and Fourier transform infrared spectroscopy (FTIR). Apparent morphological observation displays an irregular cross-sectional shape and a scattered diameter distribution for R-PET fibers. Compared with O-PET fibers, R-PET fibers demonstrate a greater breaking strength and smaller elongation at break, resulting from the lower crystallinity and higher degree of orientation. Furthermore, the R-PET fibers have the same chemical structure as that of O-PET fibers demonstrated by FTIR spectroscopy, but TGA results show that thermal stability of R-PET fibers is significantly inferior to that of O-PET fibers, as a result of too many impurities and oligomers during the recycling process.

scholarly journals Negative Air Ion Release and Far Infrared Emission Properties of Polyethylene terephthalate/Germanium Composite Fiber

2017 ◽  
Vol 12 (1) ◽  
pp. 155892501701200 ◽  
Author(s):  
Zhi Chen ◽  
Jian Wang ◽  
Jing Li ◽  
Yanan Zhu ◽  
Mingqiao Ge
Keyword(s):  
Polyethylene Terephthalate ◽  
Melt Spinning ◽  
Far Infrared ◽  
Composite Fiber ◽  
Infrared Emission ◽  
Composite Fibers ◽  
Ion Release ◽  
Germanium Content ◽  
Emission Properties ◽  
Germanium Concentration

PET/germanium composite fibers that with negative air ion release and far infrared emission properties were prepared by adding germanium particles to polyethylene terephthalate (PET) and melt-spinning. The morphology, effect of the germanium content on the negative air ion release, far infrared emission, thermal and mechanical properties of the fibers were investigated. The germanium particles uniformly disperse in the PET fibers when the concentration ranged from 1% to 3 percent. The value of the negative air ions released by the PET/germanium composite fibers increased with increasing content of germanium and reached 1470 ions/cm-3 at 3% germanium concentration. The highest far infrared normal emissivity (0.9) was obtained at 3% germanium concentration. The TG and DSC analysis revealed that the two heat histories used had little effect on the PET. The crystallinity of the composite fibers decreased with increasing germanium content. Water fastness testing showed that the PET/germanium composite fibers had excellent and durable negative air ion release and far infrared emission properties. The breaking strength of the fibers decreased with increasing of the germanium content.

On-Line Measurement of Fiber Temperature in the Melt-Spinning Processes

2013 ◽  
Vol 821-822 ◽  
pp. 149-152
Author(s):  
Xin Wen ◽  
Sheng Lin Yang ◽  
Guang Li
Keyword(s):  
High Speed ◽  
Melt Spinning ◽  
Probe Field ◽  
Infrared Thermometer ◽  
Line Measurement ◽  
Measurement Results ◽  
On Line ◽  
Important Means ◽  
Method Of Measurement ◽  
Reliable Temperature

The online temperature detections of fiber along the spinning line should be the important means for the precise controlling of fiber higher order structures as well as fiber-final performance. In this paper, a method of measurement fiber temperature has been introduced which mainly use the instrument of monochromatic infrared thermometer to measure fiber temperature in the melt-spinning processes. Due to the probe field of view of monochromatic infrared thermometer being much larger than the fiber diameter, monochrome infrared thermometers can't be used to measure temperature of fibers directly, the measurement results is an average between the fiber and backgrounds, which can't be used to indicate the temperature of fibers directly and have to calibrated. The calibrated results of monochromatic infrared thermometer are compared to the measurement results of infrared thermography. It has been found that the on-line measurement with infrared thermometer could promise high-speed and highly reliable temperature testing for the fibers.

scholarly journals A APPLICATION OF LINEAMENT DENSITY AND GRAVITY METHODS TO DETECTING FRACTURE AND FAULT LANE IN THE TAMPUSU VOLCANIC FIELD (NORTH SULAWESI, INDONESIA)

2019 ◽  
Vol 5 (2) ◽  
pp. 168-172
Author(s):  
Cyrke A. N. Bujung ◽  
Donny R. Wenas
Keyword(s):  
Bouguer Anomaly ◽  
Volcanic Field ◽  
Geological Structure ◽  
Volcanic Area ◽  
Fracture Density ◽  
Line Density ◽  
Lineament Density ◽  
Geological Structures ◽  
North Sulawesi ◽  
On Line

Tampusu Mountain (± 1500 m above sea level) is located between two famous geological tourism areas in North Sulawesi, namely Lake Linow and Lake Tondano. The position of Mount Tampusu, as well as the presence of geothermal manifestations in the surrounding area is interesting to study its geological aspects both on the surface and below the surface. This study aims to determine the existence of surface geological structures based on line density, and also to determine the presence and direction of subsurface geological structures based on gravity anomaly data in Tampusu Volcanic area. The fault and fracture density method is used to map the surface geological structure, while the gravity method is used to obtain information about the geological structure of the Tampusu volcanic area between the crater of Lake Linow and the Lake Tondano caldera. The existence of a fault is known to be west of the Lake Tondano caldera which is an extension from east to southeast of the Linow Lake crater. There is a relationship between the distribution map of the bouguer anomaly value and the map of lineament density along the Lake Linow crater to Lake Tondano caldera.

scholarly journals Electrical Properties of Silver-Attached Amine Functionalized Carbon Black/Polyethylene Terephthalate Fibers Prepared by Melt-Spinning

Polymers ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1611 ◽  
Author(s):  
Choi ◽  
Ahn ◽  
Lee ◽  
Yeo
Keyword(s):  
Carbon Black ◽  
Polyethylene Terephthalate ◽  
Photoelectron Spectroscopy ◽  
Melt Spinning ◽  
Conductive Filler ◽  
Aminobenzoic Acid ◽  
X Ray ◽  
Amine Functionalized ◽  
Electron Microscopy Analysis ◽  
Conductive Fibers

In this study, amine functionalized carbon black (ABCB) was synthesized using 4-aminobenzoic acid in a phosphoric acid (PPA)/phosphorus pentoxide (P2O5) medium, and silver-attached carbon black (Ag-ABCB) was prepared by reducing AgNO3 with NaBH4 in the presence of ABCB in ethanol. Elemental, thermogravimetric, and Fourier transform-infrared analyses showed that carbon black (CB) had a well-functionalized 4-aminobenzoic acid. In addition, X-ray photoelectron spectroscopy and X-ray diffraction were used to examine the crystal structure of Ag nanoparticles. Conductive fibers were prepared by melt-spinning using ABCB, Ag-ABCB as a conductive filler, and polyethylene terephthalate (PET) as a polymer matrix. Results confirmed that the fiber that had Ag-ABCB as a conductive filler exhibited the best electrical conductivity. The dispersibility and morphology of the conductive filler in the PET matrix were confirmed through scanning electron microscopy analysis, and Ag-ABCB was the most uniformly dispersed filler in the PET matrix, with good structure.

scholarly journals Effect of melt spinning conditions on the fiber structure development of polyethylene terephthalate

Polymer ◽  
2017 ◽  
Vol 116 ◽  
pp. 367-377 ◽  
Author(s):  
R. Tomisawa ◽  
T. Ikaga ◽  
K.H. Kim ◽  
Y. Ohkoshi ◽  
K. Okada ◽  
...  
Keyword(s):  
Polyethylene Terephthalate ◽  
Melt Spinning ◽  
Fiber Structure ◽  
Structure Development
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