A Comparison of the Compression-Recovery Behavior of Conventional and Double-Base Persian Rugs: Compression Behavior

摘要

One of the most important behaviors of a rug is its compression-recovery effect. This paper compares the compression properties of a conventional and a new Persian rug. In the new rug, some free spaces are created in the base part within the warp sheets. To do the comparison experiments, five rug samples were produced: A conventional Persian rug as the comparison criterion plus four new types of rugs named Double-base Persian (DBP) rugs. At first, a theoretical analysis of the compression process in both conventional and new rugs is presented for further comparisons and validation. Then, using the tensile tester compression-recovery curves of the rug samples were obtained and experimentally investigated. Results of the theoretical analysis showed that in conventional rug, diameter, length and young's modulus of pile yarn and applied load are effective parameters, and in DBP rugs, in addition to those parameters, the gap size and warp yarn diameter are effective parameters on the compression deformation. Also, the experimental results showed that when a gap is introduced in the rug base, the comfort and compressibility were significantly improved. Besides, increasing the distance between the two warp sheets effectively improves the comfort and compressibility of the DBP rugs.