The Experts below are selected from a list of 60 Experts worldwide ranked by ideXlab platform

T Theyson - One of the best experts on this subject based on the ideXlab platform.

  • Effect of relative rubbing speed on the tribo‐electrification of Continuous Filament Yarn by stainless steel pins
    Journal of The Textile Institute, 2011
    Co-Authors: William Oxenham, Abdelfattah M Seyam, T Theyson
    Abstract:

    The effect of relative rubbing speed on the tribo‐electrification between different Continuous Filament Yarns and stainless steel “charging pins” was analysed. A modified linear tester, housed in an environmental room, was used to charge the Yarn while transporting at desired speed and input tension. The Yarn was rubbed against the charging pin, which was also rotated at different speeds. The Yarn surface charge, Yarn output tension and charging pin’s vibration were monitored in real time automatically. The results showed that for nylon Yarn charge was minimized when the Yarn/pin relative speed approached zero, regardless of the absolute rubbing speeds of Yarn and pin. It was also found that, at the same relative speed, less charge was generated when a larger pin was used. For finish‐free nylon Yarn, the charge was also minimized as the relative speed approaches zero; however, for finish‐free polyester Yarn and finish‐free polypropylene Yarn, the effect of relative rubbing speed on the electrification was...

  • effect of relative rubbing speed on the tribo electrification of Continuous Filament Yarn by stainless steel pins
    Journal of The Textile Institute, 2011
    Co-Authors: William Oxenham, Abdelfattah M Seyam, T Theyson
    Abstract:

    The effect of relative rubbing speed on the tribo‐electrification between different Continuous Filament Yarns and stainless steel “charging pins” was analysed. A modified linear tester, housed in an environmental room, was used to charge the Yarn while transporting at desired speed and input tension. The Yarn was rubbed against the charging pin, which was also rotated at different speeds. The Yarn surface charge, Yarn output tension and charging pin’s vibration were monitored in real time automatically. The results showed that for nylon Yarn charge was minimized when the Yarn/pin relative speed approached zero, regardless of the absolute rubbing speeds of Yarn and pin. It was also found that, at the same relative speed, less charge was generated when a larger pin was used. For finish‐free nylon Yarn, the charge was also minimized as the relative speed approaches zero; however, for finish‐free polyester Yarn and finish‐free polypropylene Yarn, the effect of relative rubbing speed on the electrification was...

  • static generation and dissipation of polyester Continuous Filament Yarn
    Journal of The Textile Institute, 2010
    Co-Authors: Abdelfattah M Seyam, William Oxenham, T Theyson
    Abstract:

    The effect of environmental conditions (temperature and relative humidity) and contact conditions (Yarn tension and speed) on static generation and dissipation of polyester flat Continuous Filament Yarn, when rubbed against stainless steel was analyzed. A newly developed device, housed in an environmental room, was used to charge the Yarn while moving under desired tension. The charge potentials were measured at two different positions in real time. These measurements and previously established exponential relationship permitted the calculation of the initial potential (at the generation point) and a ‘characteristic decay time’, which is a measure of static dissipation. Experimental data showed that temperature, humidity, Yarn tension, and Yarn speed have significant effects on static generation; while temperature, humidity, and Yarn speed yielded statistically significant changes on static dissipation. Anomalous behavior of static charge when measured at a temperature of 35°C, provided a meaningful clue ...

William Oxenham - One of the best experts on this subject based on the ideXlab platform.

  • effect of relative rubbing speed on the tribo electrification of Continuous Filament Yarn by stainless steel pins
    Journal of The Textile Institute, 2011
    Co-Authors: William Oxenham, Abdelfattah M Seyam, T Theyson
    Abstract:

    The effect of relative rubbing speed on the tribo‐electrification between different Continuous Filament Yarns and stainless steel “charging pins” was analysed. A modified linear tester, housed in an environmental room, was used to charge the Yarn while transporting at desired speed and input tension. The Yarn was rubbed against the charging pin, which was also rotated at different speeds. The Yarn surface charge, Yarn output tension and charging pin’s vibration were monitored in real time automatically. The results showed that for nylon Yarn charge was minimized when the Yarn/pin relative speed approached zero, regardless of the absolute rubbing speeds of Yarn and pin. It was also found that, at the same relative speed, less charge was generated when a larger pin was used. For finish‐free nylon Yarn, the charge was also minimized as the relative speed approaches zero; however, for finish‐free polyester Yarn and finish‐free polypropylene Yarn, the effect of relative rubbing speed on the electrification was...

  • Effect of relative rubbing speed on the tribo‐electrification of Continuous Filament Yarn by stainless steel pins
    Journal of The Textile Institute, 2011
    Co-Authors: William Oxenham, Abdelfattah M Seyam, T Theyson
    Abstract:

    The effect of relative rubbing speed on the tribo‐electrification between different Continuous Filament Yarns and stainless steel “charging pins” was analysed. A modified linear tester, housed in an environmental room, was used to charge the Yarn while transporting at desired speed and input tension. The Yarn was rubbed against the charging pin, which was also rotated at different speeds. The Yarn surface charge, Yarn output tension and charging pin’s vibration were monitored in real time automatically. The results showed that for nylon Yarn charge was minimized when the Yarn/pin relative speed approached zero, regardless of the absolute rubbing speeds of Yarn and pin. It was also found that, at the same relative speed, less charge was generated when a larger pin was used. For finish‐free nylon Yarn, the charge was also minimized as the relative speed approaches zero; however, for finish‐free polyester Yarn and finish‐free polypropylene Yarn, the effect of relative rubbing speed on the electrification was...

  • static generation and dissipation of polyester Continuous Filament Yarn
    Journal of The Textile Institute, 2010
    Co-Authors: Abdelfattah M Seyam, William Oxenham, T Theyson
    Abstract:

    The effect of environmental conditions (temperature and relative humidity) and contact conditions (Yarn tension and speed) on static generation and dissipation of polyester flat Continuous Filament Yarn, when rubbed against stainless steel was analyzed. A newly developed device, housed in an environmental room, was used to charge the Yarn while moving under desired tension. The charge potentials were measured at two different positions in real time. These measurements and previously established exponential relationship permitted the calculation of the initial potential (at the generation point) and a ‘characteristic decay time’, which is a measure of static dissipation. Experimental data showed that temperature, humidity, Yarn tension, and Yarn speed have significant effects on static generation; while temperature, humidity, and Yarn speed yielded statistically significant changes on static dissipation. Anomalous behavior of static charge when measured at a temperature of 35°C, provided a meaningful clue ...

  • The Physical Properties of Composite Yarns Produced by an Electrostatic Filament-charging Method
    Journal of The Textile Institute, 1996
    Co-Authors: G. C. East, C. A. Lawrence, William Oxenham
    Abstract:

    A technique is described for the separation of the individual Filaments of a Continuous-Filament Yarn. This involves the Yarn's being treated with a small amount of Permalose TM anti-static agent and the induction of electrostatic charges onto the individual Filaments. The separated Filaments are intermingled with a drafted ribbon of fibres at the front-roller nip of a ring-spinning frame, to produce 20-tex 70/30 cotton/polyester-fibre Filament-blended composite Yarns in which a degree of mixing between Fibres and Filaments was achieved. Cotton ring-spun and the equivalent core-spun Yarns were also made to compare their physical properties with those of the composite Yarns. Twist, fibre length, and the roving-feeding arrangement were varied to observe their influence on the Yarn properties.

A. Pakhira - One of the best experts on this subject based on the ideXlab platform.

  • EVALUATION OF THE WEAVABILITY OF POLYESTER-FIBRE MULTIFilament SIZED Yarn
    Journal of The Textile Institute, 1998
    Co-Authors: Bijoya Kumar Behera, A. Pakhira
    Abstract:

    The mechanism of warp breakage during the weaving of polyester-fibre Continuous-Filament Yarns is described. Techniques for the laboratory evaluation of the weavability of sized Continuous-Filament Yarn are suggested. Correlations between various weavability indices and sized-Yarn and size-material properties are estimated to determine which of the methods gives a better representation of the relative weaving properties of Continuous-Filament sized Yarn. The performance of various size materials when applied to polyester-fibre Yarn is studied. The performance of sized microfibre Yarn is also highlighted.

  • studies on structural changes in and damage to polyester fibre Continuous Filament Yarn during sizing
    Journal of The Textile Institute, 1998
    Co-Authors: B K Behera, A. Pakhira
    Abstract:

    This paper presents an account of mechanical, thermal, and thermomechanical damage taking place during the sizing of polyester-fibre Continuous-Filament Yarns. Structural changes due to axial, transverse, and tangential forces on the Yarn during sizing are studied by using X-ray-diffraction and birefringence techniques. Surface damage to the Yarn is examined by the scanning electron microscope. The effect of a squeeze load on fibre damage is also investigated. The study is extended to textured and microdenier multiFilament Yarns.

P W Foster - One of the best experts on this subject based on the ideXlab platform.

  • Structure/Property Relationships of Poly(ethylene terephthalate) Continuous-Filament Yarn
    Journal of The Textile Institute, 1991
    Co-Authors: S. K. Mukhopadhyay, D J Mwaisengela, P W Foster
    Abstract:

    Two commercial PET Yarns, one as-spun and the other highly crystalline and drawn, were annealed at l8°C under various conditions. Mechanical and thermal-response measurements were made under high transient-heating conditions by using a UMIST-built Universal Fibre Tester (UFT). Differential-scanning-calorimetry (DSC) measurements were also made. A middle endotherm was observed on DSC traces for both the PET samples that had been annealed freely (free to shrink). Further thermo-mechanical treatments of these pre-annealed samples were made and thermal, creep, tangent-modulus, and other mechanical properties are recorded. The experimental results show structural instability in the fibre morphology irrespective of the process histories.

  • structure property relationships of poly ethylene terephthalate Continuous Filament Yarn
    Journal of The Textile Institute, 1991
    Co-Authors: Samrat Mukhopadhyay, D J Mwaisengela, P W Foster
    Abstract:

    Two commercial PET Yarns, one as-spun and the other highly crystalline and drawn, were annealed at l8°C under various conditions. Mechanical and thermal-response measurements were made under high transient-heating conditions by using a UMIST-built Universal Fibre Tester (UFT). Differential-scanning-calorimetry (DSC) measurements were also made. A middle endotherm was observed on DSC traces for both the PET samples that had been annealed freely (free to shrink). Further thermo-mechanical treatments of these pre-annealed samples were made and thermal, creep, tangent-modulus, and other mechanical properties are recorded. The experimental results show structural instability in the fibre morphology irrespective of the process histories.

Abdelfattah M Seyam - One of the best experts on this subject based on the ideXlab platform.

  • Effect of relative rubbing speed on the tribo‐electrification of Continuous Filament Yarn by stainless steel pins
    Journal of The Textile Institute, 2011
    Co-Authors: William Oxenham, Abdelfattah M Seyam, T Theyson
    Abstract:

    The effect of relative rubbing speed on the tribo‐electrification between different Continuous Filament Yarns and stainless steel “charging pins” was analysed. A modified linear tester, housed in an environmental room, was used to charge the Yarn while transporting at desired speed and input tension. The Yarn was rubbed against the charging pin, which was also rotated at different speeds. The Yarn surface charge, Yarn output tension and charging pin’s vibration were monitored in real time automatically. The results showed that for nylon Yarn charge was minimized when the Yarn/pin relative speed approached zero, regardless of the absolute rubbing speeds of Yarn and pin. It was also found that, at the same relative speed, less charge was generated when a larger pin was used. For finish‐free nylon Yarn, the charge was also minimized as the relative speed approaches zero; however, for finish‐free polyester Yarn and finish‐free polypropylene Yarn, the effect of relative rubbing speed on the electrification was...

  • effect of relative rubbing speed on the tribo electrification of Continuous Filament Yarn by stainless steel pins
    Journal of The Textile Institute, 2011
    Co-Authors: William Oxenham, Abdelfattah M Seyam, T Theyson
    Abstract:

    The effect of relative rubbing speed on the tribo‐electrification between different Continuous Filament Yarns and stainless steel “charging pins” was analysed. A modified linear tester, housed in an environmental room, was used to charge the Yarn while transporting at desired speed and input tension. The Yarn was rubbed against the charging pin, which was also rotated at different speeds. The Yarn surface charge, Yarn output tension and charging pin’s vibration were monitored in real time automatically. The results showed that for nylon Yarn charge was minimized when the Yarn/pin relative speed approached zero, regardless of the absolute rubbing speeds of Yarn and pin. It was also found that, at the same relative speed, less charge was generated when a larger pin was used. For finish‐free nylon Yarn, the charge was also minimized as the relative speed approaches zero; however, for finish‐free polyester Yarn and finish‐free polypropylene Yarn, the effect of relative rubbing speed on the electrification was...

  • static generation and dissipation of polyester Continuous Filament Yarn
    Journal of The Textile Institute, 2010
    Co-Authors: Abdelfattah M Seyam, William Oxenham, T Theyson
    Abstract:

    The effect of environmental conditions (temperature and relative humidity) and contact conditions (Yarn tension and speed) on static generation and dissipation of polyester flat Continuous Filament Yarn, when rubbed against stainless steel was analyzed. A newly developed device, housed in an environmental room, was used to charge the Yarn while moving under desired tension. The charge potentials were measured at two different positions in real time. These measurements and previously established exponential relationship permitted the calculation of the initial potential (at the generation point) and a ‘characteristic decay time’, which is a measure of static dissipation. Experimental data showed that temperature, humidity, Yarn tension, and Yarn speed have significant effects on static generation; while temperature, humidity, and Yarn speed yielded statistically significant changes on static dissipation. Anomalous behavior of static charge when measured at a temperature of 35°C, provided a meaningful clue ...