Investigation of The Characteristics of Elasticised Woven Fabric by Using PBT Filament Yarn

Owning to growing demand for comfortable clothes,elastane filament yarns are being used in fabrics for several garments.In this study,core spun yarn were produced with cotton fibers and PBT/elasttane filament yarns(cotton as sheath material,PBT yarn and elastane as core yarns).Twill woven(1/3 Z)fabrics were produced by using core spun yarns (30tex)and cotton yarns(30tex)as weft,and 100% cotton yarn (59tex) as warp yarns.The fabrics consisting of PBT were washed at 100 degree for 30 minutes to gain elasticity.The woven fabrics' weight,thickness,elongation,permanent elongation,demensional stability,air pemeability,thermal conductivity,thermal absorptivity characteristics were tested and statistically evaluated.According to the results,the fabrics containing PBT and elastane filaments had similar elongation and shrinkage values.PBT filament yarns have a great potential to produce lightweight elastic fabrics.
Conclusion:

The fabrics woven with PBT,elastane and cotton yarns were analysed in terms of elogation,dimensional stability and themal comfort.The weight,thickness,elongation,permanent elongation,dimensional stability,air permeability,thermal conductivity,thermal absorptivity and relative water vapour permeability properties of the fabric samples were tested and evaluated statistically.The results indicated that:

1.Washing treatment had a significant effect on the elongation and permanent elongation values of the fabric samples containing PBT.After washing,the elongation value of PBT filament fabric sample was increased 57.2% in weftwise and 1.4% in warpwise,while these values of PBT/Cotton fabric sample in weft and warpwise were increased 33.6% and 3.4%,respectively.Additionally the PBT Filament and PBT/Cotton fabric samples' permanent elongation values were increased by 9% and 9.8%,respectively.

2.PBT Filament and PBT/Cotton fabric samples fabrics had higher elongation values in both directions compared with the other fabric samples.

3.The lowest permanent elongation values were obtained from the fabric samples containing yarns and instead of elongation a contraction was occurred with these fabric samples.

4.The shrinkage value of the PBT Filament fabric sample and fabric samples containing elastane yar shrinkage value in warpwise after washing.The highest shrinkage values were obtained from PBT/Cotton and Elastane 4.0 fabric samples.

5.In terms of elastic characteristics,PBT Filament and PBT/Cotton fabric samples had higher elongation values in warp and weftwise.Additionally PBT Filament fabric sample and fabric samples containing elastane yarns had similar shrinkage values in both directions.PBT filament fabric sample with higher elongation and similar shrinkage characteristics provied more elastic behaviour with lower weight and thickness values.

6.The fabric fsamples containing elastane yarns had lower air permeability compare to others.100% Cotton fabric sample exhibited the highest air permeability following by PBT filament and PBT/Cotton fabric samples.

7.PBT filament fabric sample and fabric sample containing elastane yarn(Elastane 3.0,3.5,4.0)had the highest and the lowest water vapour permeability values,respectively.

8.The fabric samples containing elastane yarns had higher thermal conductivity and gave the cooler feeling at initial touch due to their higher thermal absorptivity characteristc.

9.PBT filament fabric sample had lower thermal conductivity and absorptivity values.

According to these results,PBT filament yarns have a great potential to produce lightweight elastic fabrics.Besides,fabrics with PBT filament yarns have better durability to textile finishing processes and longer lifetime than the fabrics containing elastane.

Writen by Huseyin Kadoglu,Krste Dimitrovski,Arzu Marmarali,Pinar Celik,Guldemet Basal Bayraktar,Tuba Bedez Ute,Gozde Ertekin,Andrej Demasar,Klara Kostanjek.