Mechanical Properties of Poly(ethylene terephthalate) Fiber Produced by Conjugate Melt Spinning with Polystyrene and CO2 Laser-Heated Drawing

Nakata, Kazuhiro; Ohkoshi, Yutaka; Gotoh, Yasuo; Nagura, Masanobu; Funatsu, Yoshitsugu; Kikutani, Takeshi

doi:10.2115/fiber.60.352

Cited by 5 publications

(8 citation statements)

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“…8. In addition to the present data, the figure also plots data for polystyrene/PET sheath-core type conjugated fibers extracted by carbon tetra-K. Nakata et al: Conjugated Melt Spinning chloride (Nakata et al, 2004) and tri-butyl phosphate (Nakata et al, 2005). All the conjugated spun and drawn fibers show a higher tensile strength than the single-component spun and drawn fibers for the same birefringence.…”

Section: Resultsmentioning

confidence: 80%

“…A PET fiber having a tensile strength of 1.14 N/tex could be produced by conjugated melt spinning, laser drawing, and hea- (Nakata et al, 2004), (+) (Nakata et al, 2005) ter re-drawing. The PET fiber obtained by conjugated spinning could be laser drawn to a higher draw ratio under a lower drawing stress, and could also be drawn up to a higher total draw ratio during the re-drawing.…”

Section: Resultsmentioning

confidence: 99%

“…It has been reported that the PET fiber, which has a tensile strength of 1.38 GPa, can be produced by polystyrene/PET sheath-core type conjugated melt spinning and laser drawing (Nakata et al, 2004). In the report, drawn conjugated fibers showed a higher tensile strength than ordinary PET fibers for the same birefringence.…”

Section: Introductionmentioning

confidence: 91%

“…In recent years, a number of methods have been investigated to produce highstrength fibers by controlling the melt structure during the melt spinning process (Kikutani et al, 1996;Radhakrishnan et al, 1997;Jeon et al, 1998;Takarada et al, 2001;Masuda et al, 2004;Nakata et al, 2004;Masuda et al, 2010). Among these methods, the conjugated melt spinning process is used in the present study (Radhakrishnan et al, 1997;Nakata et al, 2004). Conjugated spinning is melt spinning with two polymers coextruded from the spinneret.…”

Section: Introductionmentioning

confidence: 99%

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High-Strength PET Fibers Produced by Conjugated Melt Spinning and Laser Drawing

Nakata

Ohkoshi

et al. 2012

International Polymer Processing

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The mechanical properties of conjugated-spun and laser drawn poly(ethylene terephthalate) (PET) fibers were investigated. The as-spun fibers used for the laser drawing were made by conjugated melt spinning with the copolymer of p-hydroxybenzoicacid and 2-hydroxy-6-naphthoicacid or polystyrene. The PET fibers prepared by conjugated spinning could be laser drawn to higher draw ratios under lower drawing stresses. The drawn fiber could be re-drawn up to a higher total draw ratio. Thus, a PET fiber having a tensile strength of 1.14 N/tex could be produced.

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Section: Resultsmentioning

confidence: 80%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

High-Strength PET Fibers Produced by Conjugated Melt Spinning and Laser Drawing

Nakata

Ohkoshi

et al. 2012

International Polymer Processing

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“…The term "melt structure control" [4][5][6][7][8][9][10][11] refers to methods of producing a homogeneous chain network structure, and bicomponent melt spinning has been investigated as one process of melt structure control. 5,9,11 The bicomponent melt spinning process, in which two types of polymer are simultaneously extruded from a spinneret, produces a unique fiber structure that is substantially different from that of a melt spun homopolymer. 5 The chain orientation relies heavily on the extensional stress at the solidification point in melt spinning, and therefore in bicomponent spinning the molecular orientation can be controlled by selecting an appropriate secondary component.…”

Section: Introductionmentioning

confidence: 99%

Fiber structure development in PS/PET sea-island conjugated fiber during continuous laser drawing

Sugawara

Ikaga

Kim

et al. 2015

Polymer

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The effect of draw ratio, molecular weight, and sea-island conjugated spinning with a polystyrene component on the fiber structure development of PET during laser drawing was analyzed by in-situ measurements with a 0.1 ms time resolution using an ultra-high luminance X-ray beam generated from a synchrotron equipped with an undulator. The fiber temperature increased from 120 o C to 160-220 o C during the structure development process. By drawing the higher molecular weight PET to a higher draw ratio, a larger amount of fibrillar smectic mesophase formed just after the onset of necking, and a more highly oriented crystal formed after the extinction of the smectic mesophase. Accordingly, fibers with higher strength and higher thermal shrinkage stress were obtained. On the other hand, by conjugated spinning with a PS component, the fiber temperature increased along with an increase in the drawing stress, but the stress applied to the PET component should have decreased.The amount of smectic mesophase formed by the conjugated-spinning process was drastically decreased, and no crystallization induction time was observed, unlike the other cases. Crystallization, particularly the growth of a lamellar crystal, was also promoted. Moreover, a higher Young's modulus, a higher yield stress, and a higher shrinkage stress were observed for the conjugated-spun and drawn fibers. Therefore, the fibrillar smectic mesophase seems to block the formation of the lamellar crystal. Furthermore, the resultant fibrillar structure tends to result in a higher strength, but a relatively lower modulus and yield strength of the fiber.

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Poly(lactide) nanofibers produced by a melt‐electrospinning system with a laser melting device

Ogata

Yamaguchi

Shimada

et al. 2007

J of Applied Polymer Sci

143

107

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A new melt-electrospinning system equipped with a CO 2 -laser melting device was developed. Rod-like samples were prepared from poly(lactide) pellets, and then fibers were produced from the samples using the new system. The effects of producing conditions on the fiber diameter were investigated. Furthermore, the physical properties of the fibers were investigated. The following conclusions were obtained: (i) in a special case, fibers having an average fiber diameter smaller than 1 mm could be obtained using the system developed; (ii) the fiber diameter could be decreased with increased laser output power, but the physical properties of the fibers such as the melting point and the molecular weight were decreased; and (iii) the electrospun fibers exhibited an amorphous state, and the annealed fibers exhibited an isotropic crystal orientation.

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Mechanical Properties of Poly(ethylene terephthalate) Fiber Produced by Conjugate Melt Spinning with Polystyrene and CO2 Laser-Heated Drawing

Cited by 5 publications

References 0 publications

High-Strength PET Fibers Produced by Conjugated Melt Spinning and Laser Drawing

High-Strength PET Fibers Produced by Conjugated Melt Spinning and Laser Drawing

Fiber structure development in PS/PET sea-island conjugated fiber during continuous laser drawing

Poly(lactide) nanofibers produced by a melt‐electrospinning system with a laser melting device

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