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Pw Foster – One of the best experts on this subject based on the ideXlab platform.

  • Effects of core-yarn overfeed on texturing performance: comparison between AirJet and steam-Jet texturing
    Journal of The Textile Institute, 2015
    Co-Authors: G.l.d. Wickramasinghe, Pw Foster

    Abstract:

    The objectives of this research work were to investigate the use of high-pressure steam in order to replace Air in the production of spun-like textured yarns and to investigate the optimum level of core-yarn overfeed ratio for steam-Jet textured yarn for the application of sewing threads. An existing AirJet texturing machine was modified to supply either Air or steam to the texturing nozzle. Using an identical nozzle, both AirJet and steam-Jet textured yarns were manufactured. Loop instability and loop density increased and strength and tenacity decreased when the core-yarn overfeed was increased in both AirJet and steam-Jet textured yarns. Steam-Jet textured yarns have lower loop instability, lower loop density and higher tensile properties than that of the AirJet textured yarns. Sewability results show that for both AirJet and steam-Jet textured sewing threads, core-yarn overfeed ratios of 5.5 and 8.3% give better sewability.

  • Effect of nozzle size on texturing performance: comparison between AirJet and steam-Jet texturing
    Journal of The Textile Institute, 2014
    Co-Authors: G.l.d. Wickramasinghe, Pw Foster

    Abstract:

    The objectives of this research work were to investigate the use of steam in order to replace Air in the production of spun-like textured yarn and to investigate the optimum nozzle size for steam-Jet textured yarn for the application of sewing thread. An existing AirJet texturing machine was modified to supply either Air or steam to the texturing nozzle. Using four texturing nozzles, both AirJet and steam-Jet textured yarns were manufactured. The effect of nozzle size on process and yarn parameters has been studied and compared with AirJet textured yarns. The results show that spun-like textured yarn manufactured using steam has lower loop instability and higher tensile properties than Air at comparable fluid pressures. SEM image analysis shows that the entangled structure of the steam-Jet textured yarns is similar to AirJet textured yarns. Further, sewability results show that steam-Jet textured yarns are suitable to manufacture sewing threads.

Vijay Kumar – One of the best experts on this subject based on the ideXlab platform.

  • Sewing Performance of PV & PES AirJet Textured Sewing Threads in Denim Fabrics
    Journal of textile and apparel technology and management, 2014
    Co-Authors: Vijay Kumar

    Abstract:

    At present, mainly three types of sewing thread constructions are used in high speed sewing namely spun polyester thread, cotton wrapped poly core thread and poly wrapped poly core thread. As the manufacturing processes of these threads are very costly, AirJet textured sewing threads are the most economical option available today, and their introduction into the clothing indus¬try is one of the best ways of reducing production costs. PES AirJet textured sewing thread gives higher seam efficiency, seam slippage and seam pucker as compared to PV AirJet textured sewing thread. PV AirJet textured sewing thread is more suitable for lighter denim whereas PES AirJet textured sewing thread is suitable for heavier denim.

  • sewability of Air Jet textured sewing threads in denim
    Journal of textile and apparel technology and management, 2013
    Co-Authors: Rajkishore Nayak, Rajiv Padhye, Sudersan Dhamija, Vijay Kumar

    Abstract:

    Sewability of a fabric depends on the fabric low-stress mechanical properties, sewing thread properties and the sewing machine settings. This paper investigates the sewability of denim fabrics stitched with AirJet textured sewing thread. It was found that the fabric formability is dependent on the fabric weight. Fabric formability was higher for the heavyweight fabrics and lower for the lightweight fabrics. The overall bending rigidity was the lowest for the denim with the lowest formability and weight. Polyester AirJet textured sewing threads resulted in higher seam efficiency and seam pucker, but lower needle cutting index compared to Polyester/Viscose AirJet textured sewing thread. In weft direction the seam efficiency was higher, whereas in warp direction the needle cutting index was higher for all the fabrics.

V. K. Kothari – One of the best experts on this subject based on the ideXlab platform.

  • Studies on AirJet textured sewing threads
    Indian Journal of Fibre & Textile Research, 2003
    Co-Authors: R. S. Rengasamy, V. K. Kothari, Ramasamy Alagirusamy, S. Modi

    Abstract:

    AirJet textured, textured-twisted and textured-pli ed yarns have been made from apparel -grade polyester flat yarns and compared with commercial cotton a nd spun polyeste r sewing threads for prope rti es a nd seam efficiency. The uniformity characteri stics of AirJet textured sewin g threads are far superior to those of cotton and spun polyeste r threads. The tenacity , loop stren gth and knot strength of textured sewing threads are lowe r than those of spun polyester threads but sli ghtl y better th a n those of cotton threads. Textured threads have hi g h friction values than commercial threads. The seam effic ie ncy of fabrics stit c hed with textured threads is hi ghe r compared to that of fabrics stitc hed with cotton threads and close to th at of fabrics stitc hed with spun polyester threads. Minimum knot strength has a good correlation with seam effic ie ncy.

  • AirJet texturing of draw-textured yarns
    Indian Journal of Fibre & Textile Research, 1999
    Co-Authors: V. K. Kothari, V. K. Yadav

    Abstract:

    The possibility of feeding false-twist textured yam in AirJet texturing to obtain a yam with higher bulk has been studied. Use of a modified false-twist textured feed yam for AirJet texturing results in a yam of higher bulk, instabili.ty and tenacity but of lower elongation, initial modulus and linear density, as compared to AirJet textured yams produced from flat feed yams. The level of bulk .can be further enhanced by post heat-setting the AirJet textured yams made from modified false­ twist textured yams, but the resultant yams have higher instability and inferior tensile properties. Low interfilament friction , Jow skein shrinkage and higher bulk retraction are desirable in the modified false-twist textured yam meant for AirJet texturing process.

  • AirJet texturing: Effect of Jet type and some process parameters on properties of AirJet textured yarns
    , 1991
    Co-Authors: V. K. Kothari, N B Timble

    Abstract:

    The distinguishing fe atures of different Air texturing Jets have been described and the te st methods use d to assess some impo rtant properties of Air textured ya rn s have been discussed. The properties of Air textured yarns produced using various currentl y used commercial Jets have been compared. The re sults show that the performa nce of cylindrical Jets and Taslan type XX Jet for parall el end tex turing of 76 denJ36 fil polyester yarns is superior. The effe cts of some important process parameters such as overfeed percentage, Air pressure and heater temperature on various properti es of AirJet te xtured yarns have bee n reported . The relation ships between AirJet textured ya rn propertie s a nd processing parameters have been assessed in terms of regression equations and it has bee n shown that with a few exceptions, most of the properties of AirJet textured yarns are linearly related to th e process parameters studied.