جستجوی مقالات مرتبط با کلیدواژه « weft density » در نشریات گروه « مهندسی شیمی، نفت و پلیمر »

Fabric compressibility has a significant effect on the application, comfort, quality, and thermal properties of the fabric. Lateral compression affects the diameter of the yarns and fabric density, which causes a change in the cover factor (CF). The purpose of this paper is to investigate fabric compressibility, the cover factor, and the cover factor variation in compressed states. In this research, woven fabrics were produced with different weft density and different weft materials (polyester and viscose). The compression test was conducted at different speeds and the fabric was filmed at the same time. The density and the diameter of the warp and weft yarns, as well as the CF were extracted by image processing using video pictures. Then the fabric compressibility, CF, and, CF Variation (CFV) were modeled using the response surface method (RSM). The results obtained in the study clearly showed these models are acceptable with a high correlation. According to this model, with increasing pressure and decreasing density, fabric compressibility and CFV often increase. The compression variation range and CF were greater in polyester fabrics than in viscose fabrics by changing weft density.

Water, as a necessary liquid for life and an essential source of industries, must be used and recycled in aregular cycle. Water filtration is a special area that is being developed by relevant experts. In many areasof activity, the most critical goal is to increase the separation and filtration efficiency. The efficiency ofan effective filtration system chiefly depends on the selection of a suitable porous filter. Woven fabricsare utilized as filters in liquid filtration. In this research, a water filtration unit was carefully designed andassembled to evaluate woven polyester fabric’s filtration efficiency in a standard procedure. The particlesize distribution in water was between 100-140 μm. The woven polyester fabrics, that were differed inweft density and weave, were produced by a projectile weaving machine. The samples were used as filterson both sides of the back and face of the fabric. After the separation process, the filtered water turbidityand the filtration efficiency for each sample were evaluated. Statistical analysis of the results showed thatthere was a significant difference in filtration efficiency when using low-density fabric samples on bothsides of the back and face of the fabric. The water filtration efficiency when using the backside of thesamples is higher than that when using the face side. In fabric filters with different weave structures anddensities, it was detected that the filtration efficiency is not significantly the same. Finally, according tothe ultimate performance of fabric filters in the filtration process, the samples were classified.