Effect of warp density, weft Density, and count of pile yarn on mechanical properties and structural variations of face to face woven carpets

Machine-woven carpets are pile fabrics. Warp and weft yarns are used for making the backing surface an piles (i.e., upright loops or strands of yarns) are covering the upper surface of carpets. In this study, the relations between structural parameters of machine-woven carpets namely weft and warp yarns density, pile yarns count and kind of warp yarn denting with recovery after dynamic loading, thickness variation in static loading and finally the mass variation during the hexapod walker carpet tester were evaluated. Two pile yar counts (i.e. 18/3 Nm and 33/3 Nm), two levels of warp density 700 and 1200 per meter, two kind of dentin of warp yarn (i.e. one and two warp yarns per dent), and three levels of weft density (i.e., 2550,3000, and 350 per meter) were used to produce the samples. The results showed that the highest value of compressibility in dynamic loading was varied between 40.16% and 23.97%. The lowest value of mass variation in tetrapod walker testing was obtained in sample woven with highest value of warp and weft density. Moreover, bincreasing the count of pile yarn and the initial thickness of sample, the mass reduction was increased accordingly.