Comparative Study between R-Pet & Virgin Pet in Terms of Technical Aspect and Market Potential

The crux of the new trend lies in sustainability and so follows the recyclable products. Polyester is of immense importance as a fibre when it comes to textile and garment, but the type used (Virgin PET) is not an eco-friendly one. Polyester filament extracted from the recycled PET bottles can cater to the unmet need of an eco-friendly substitute to the virgin polyester. A comparative study has been made to analyse whether recycled PET can perform the functionality of virgin PET. The physical properties of both stand out to be the same, signalling the use of recycled PET filament. Recycled PET filament finds it limitation in non-uniform dyeing but the same can be solved through chemical extraction. Keywords: Virgin PET, Recycled PET, Instron test, Boiling water shrinkage test, sustainable, market potential.

Non-contact detection of polyester filament yarn tension in the spinning process by the laser Doppler vibrometer method

The precise detection of polyester filament yarn (PFY) tension in the spinning process is critical to ensure product quality. The laser Doppler vibrometer (LDV) method is proposed to achieve non-contact detection of PFY tension in this paper. By employing the Hamilton principle, the transverse dynamics differential equations of PFY are derived, which are discretized and solved by the Galerkin method and Runge–Kutta method, respectively. In the equations, the PFY between two adjacent rollers is simplified as an axially moving string to verify the generality of calculating natural frequencies. The calculated natural frequencies from the axially moving string model are compared with solved results from the transverse dynamics differential equations. It is shown that the approximation of natural frequencies can be obtained from the axially moving string model. This study attempts to establish an approximate generic model among the PFY tension, the spinning speed and the first natural frequency based on axially moving string model, from which the PFY tension can be calculated efficiently by employing the measured natural frequencies. The LDV method is used to measure the natural frequencies. A major advantage of the proposed method is to realize non-contact detection of PFY tension. The method is more useful under high-speed spinning conditions where contact tension detectors are not available. An experimental analysis is carried out to verify the effectiveness and accuracy of the proposed method. Therefore, it is believed that the non-contact detection of PFY tension in the spinning process by the LDV method is feasible.

Micro-polyester filament yarns and their fabric moisture transport characteristics for sportswear

S.M. Udaya Krithika, C. Prakash Department of Fashion Technology, Sona College of Technology, Salem/India M.B. Sampath Department of Textile Technology, K.S. Rangasamy College of Technology, Namakkal/India M. Senthilkumar Department of Textile Technology, PSG Polytechnic College, Coimbatore/India In this present study, the effect of filament fineness on yarn wicking and the effect of yarn fineness on fabric wicking is studied. In order to fulfill the objective, 150 denier micro-denier PET yarns containing 34, 48, 108, 144 and 288 filaments were selected.

THE EFFECT OF FIBER CROSS-SECTIONAL SHAPE AND TEXTURING TEMPERATURE ON KNITTED FABRIC AIR PERMEABILITY

Texturized yarns are often preferred especially in home textiles and sportswear. To improve polyester filament properties, mechanical, thermal, chemical and combinations of texturing processes are applied. With these processes, filament yarns take on a curved and voluminous structure and gain a permanent form. Properties of the texturized yarn can be varied as raw materials properties, machine type and process factors. This study covers the investigation of the effect of cross-sectional shape of fiber (round and trilobal) and texturing process temperature (150, 175 and 200 0C) on air permeability of false twist textured polyester single jersey knitted fabrics. Results showed that the highest air permeability value was obtained from knitted fabric with round fiber cross-sectional shape polyester filament textured at 150 0C. According to the statistical analysis, both the fiber cross-sectional shape and process temperature were found to have a significant effect on air permeability property.