@article { author = {Mokhtari, Fatemeh and Hosseini Varkiyani, Seyed Mohammad and Latifi, Masoud}, title = {Evaluation of Floorcovering Abrasion Resistance by Means of Image Processing Technique}, journal = {Journal of Textiles and Polymers}, volume = {3}, number = {2}, pages = {40-45}, year = {2015}, publisher = {ITAST (Iranian Textile Association of Science and Technology)}, issn = {2322-5203}, eissn = {2423-3390}, doi = {}, abstract = {An important factor in material quality is the time duration that materials are used (known as substance lifetime). Lifetime is a function of several factors, and among them wearing and abrasion resistances are more important than the other aspects. In addition, to the physical and mechanical properties, abrasion has a significant effect on the textiles appearance. This phenomenon considerably influences the texture of floor coverings in which continuous abrasion are applied. While the texture retention of the floorcovering during lifetime usage is quite desirable and leads to consumer satisfaction, it is necessary to evaluate the abrasion resistance of floor covering before its application. In this paper, the abrasion resistance for three types of floorcoverings (100% polypropylene(pp), 100% polyester(p) and 50/50% polypropylene-polyester(pp/p)) are tested with four kinds of steel abrasives with different coefficients of friction during three steps of abrasion cycles (1000,3000 and 5000). Their images were assessed by image processing method with two different functions. The results approved the procedure of the abrasion during 5000 cycles in the experimental condition. Weight changes of the floor-covering samples were evaluated as an index to illustrate the abrasion process.}, keywords = {Abrasion,floorcovering,image processing,intensity profile}, url = {http://www.itast.ir/article_13951.html}, eprint = {http://www.itast.ir/article_13951_4d639b0d8ec8cb0b0d7a38b4dadd6e1c.pdf} } @article { author = {Rostami, Minoo and Izadan, Hossein and Mahyar, Forough}, title = {Colour Emotion Models, CIELAB Colour Coordinates, and Iranian Emotional Responses}, journal = {Journal of Textiles and Polymers}, volume = {3}, number = {2}, pages = {46-54}, year = {2015}, publisher = {ITAST (Iranian Textile Association of Science and Technology)}, issn = {2322-5203}, eissn = {2423-3390}, doi = {}, abstract = {Ten colour emotional scales, namely, "Warm Cool", "Active-Passive", "Like-Dislike", "Clean-Dirty", "Fresh-Stale", "Modern-Classical", "Heavy-Light", "Hard- Soft", "Tense-Relaxed", and "Masculine-Feminine"are investigated for single-colour stimuli in CIELAB colour space within a psychophysical experiment by forty observers. The relationships between Iranian colour emotional responses and CIELAB colour coordinates are examined. Based on the results, colours with higher values of L*are associated to the emotional words, such as clean, light and soft. Colour with higher C* values are also associated to warm, modern, and masculine emotional words. Iranian colour emotional responses are also assayed in three existed colour emotional models, Li Chen Ou's, Sato's and Xin-Cheng's models, for four colour emotional dimensions, "Warm-Cool", "Heavy- Light", "Active-Passive", and "Hard-Soft" scales. Results show that the Ou's model is a fairly good predictor for "Warm-Cool" scale, while the Xin-Cheng's model is a good predictor for "Heavy-Light" and "Hard-Soft" scales. In "Active-Passive" scale, none of the existed models are found to be a good predictor for Iranian colour emotional dimension.}, keywords = {}, url = {http://www.itast.ir/article_13952.html}, eprint = {http://www.itast.ir/article_13952_7aca47b9a218acb22e69288190a3d08f.pdf} } @article { author = {Kargar, Motahareh and Payvandy, Pedram}, title = {Optimization of Fabric Layout by Using Imperialist Competitive Algorithm}, journal = {Journal of Textiles and Polymers}, volume = {3}, number = {2}, pages = {55-63}, year = {2015}, publisher = {ITAST (Iranian Textile Association of Science and Technology)}, issn = {2322-5203}, eissn = {2423-3390}, doi = {}, abstract = {In textile industry, marker planning is one of the main operations in the cutting fabric stage. Marker packing is usually used to maximize cloth exploitation and minimize its waste. In this research, a method is used based on new found meta-heuristic imperialist competitive algorithm (ICA) and Bottom-Left-Fill Algorithm (BLF) to achieve optimal marker packing. Function of the proposed method was compared with other evolutionary algorithm based marker packing methods. The results indicate that the performance of presented method is 6.5% higher than other evolutionary marker packing methods.}, keywords = {Imperialist Competitive Algorithm,marker packing,packing algorithms,optimization}, url = {http://www.itast.ir/article_13953.html}, eprint = {http://www.itast.ir/article_13953_3b197ab8ab91d0017575ef67ca06ef87.pdf} } @article { author = {Baheri, Hosnie and Bahram, Seyed Hajir}, title = {Chitosan/nanosilver Nanofiber Composites with Enhanced Morphology and Microbiological Properties}, journal = {Journal of Textiles and Polymers}, volume = {3}, number = {2}, pages = {64-70}, year = {2015}, publisher = {ITAST (Iranian Textile Association of Science and Technology)}, issn = {2322-5203}, eissn = {2423-3390}, doi = {}, abstract = {In recent years natural polymers have been widely used in biomedical applications. Application of natural and biocompatible polymers in wound dressing, medical sutures and tissue engineering are extensively growing. Additional properties are provided when metal nanoparticles such as silver and gold are incorporated in to the fibers. However, nowadays nanofibers due to their inherent properties such as higher surface to area with these nanoparticles are used for biomedical application. In this study chitosan has been converted into nanofibers and the effect of silver nanoparticle on the antibacterial properties of the nanocomposite fibers has been investigated. Chitosan (Cs)/poly (vinyl alcohol) (PVA) solutions in 2% (v/v) aqueous acetic acid were electrospun. The effects of different total concentrations of polymer solutions and mass ratios of Cs and PVA on the fibers formation and its morphology have been investigated by SEM. Effect of spinning parameters on the nanofiber diameter have been investigated. Fine nanofibers, without bead were obtained from 8% total concentration of polymer in aqueous acetic acid solution and 40/60 mass ratio of Cs/PVA. To improve the antibacterial properties of nanofibers silver was incorporated in to the electrospinning solution by two different ways ie., i) addition of silver nanoparticles into the electrospinning solution and ii) addition of silver nitrate salt and then reducing it to silver. Antibacterial activity of nanofibers against St.aureus as gram-positive and P.aeruginosa as gram-negative bacteria shows that nanofibers containing silver nanoparticles have stronger antibacterial activity than nanofibers without silver. Moreover, cell culture test shows that cells can grow easily on these nanofibrous webs.}, keywords = {Chitosan,poly (vinyl Alcohol),Electrospinning,nanosilver,Nanofiber}, url = {http://www.itast.ir/article_13954.html}, eprint = {http://www.itast.ir/article_13954_fe79b2bd8f3e664c0812c0df0be3e608.pdf} } @article { author = {Panahi, Mohsen and Tavanai, Hossein and Zarrebini, Mohammad}, title = {The Influence of Fiber Crimp on Acoustic Performance of Polypropylene Fibrous Batt}, journal = {Journal of Textiles and Polymers}, volume = {3}, number = {2}, pages = {71-75}, year = {2015}, publisher = {ITAST (Iranian Textile Association of Science and Technology)}, issn = {2322-5203}, eissn = {2423-3390}, doi = {}, abstract = {This paper reports on the effect of fiber crimp frequency on sound absorption capability of staple polypropylene nonwoven batts. Stuffer box was used to impart crimp to spun tow. Crimping of the tow renders the fibers the required textile applicability. In this work, polypropylene batts composed of staple fibers with linear densities of 9, 14, and 18 denier were employed. Three crimp frequency namely low, medium and high were imparted to fibers of each denier group. Impedance tube method with sound frequencies in the range of 250 – 4000 Hz was employed to measure the sound absorption coefficient of the batts. The results showed sound absorption properties of fibrous batts were affected by fiber crimp frequency, fiber fineness and web thickness. The highest sound absorption coefficient for the 9, 14 and 18 denier batts was 78.90, 77.14 and 71.18, respectively. The crimp frequency of the fibers making these batts was 1.9, 2.3 and 3.6 crimp per cm, respectively. It was found that higher crimp frequency along the fibers of the batts lead to higher sound absorption capacity. Finally, the highest sound absorption coefficient was recorded for the web with finest fibers and highest crimp frequency.}, keywords = {Crimp,sound absorption,polypropylene staple fiber,fibrous batt,fiber fineness}, url = {http://www.itast.ir/article_13955.html}, eprint = {http://www.itast.ir/article_13955_e5dc61cdbef680b4d97bf73da05ebc77.pdf} } @article { author = {Tehrani Dehkordi, Majid}, title = {Meso-scale Modeling of Tension Analysis of Pure and Intra-ply Hybrid Woven Composites Using Finite Element Method}, journal = {Journal of Textiles and Polymers}, volume = {3}, number = {2}, pages = {76-85}, year = {2015}, publisher = {ITAST (Iranian Textile Association of Science and Technology)}, issn = {2322-5203}, eissn = {2423-3390}, doi = {}, abstract = {One of the key issues associated with using of composites in various applications is their tensile behavior. The tensile behavior of a composite material is strongly influenced by the properties of its constituents and their distribution. This paper focuses on gaining some insights into the tensile process of pure and hybrid woven composite reinforced with brittle and ductile yarns. For this purpose, mesoscale finite element simulations were performed to detect the tensile response within three types of composites: i.e, a brittle fiber reinforced composite, a ductile fiber reinforced composite and a brittle/ductile fiber reinforced composite. The numerical predictions were then compared with the experimental observations and the results were discussed to give some insights into the reinforcing mechanisms in the composites. Based on the results it can be concluded that this finite element model is a reliable tool in the prediction of the tensile behavior of pure and hybrid composite materials.}, keywords = {Mesoscale modeling,Finite element method,brittle fiber,ductile fiber,tensile properties,Composite}, url = {http://www.itast.ir/article_13956.html}, eprint = {http://www.itast.ir/article_13956_dff8d6c4c13300fdd1c4f0e5de92ae46.pdf} } @article { author = {Minapoor, Shohreh and Ajeli, Saeed and Hasani, Hossein}, title = {Investigation into the Curling Intensity of Polyester/Cotton Single Jersey Weft Knitted fabric Using Finite Element Method}, journal = {Journal of Textiles and Polymers}, volume = {3}, number = {2}, pages = {86-90}, year = {2015}, publisher = {ITAST (Iranian Textile Association of Science and Technology)}, issn = {2322-5203}, eissn = {2423-3390}, doi = {}, abstract = {Curling of knitted fabrics edges is one of the complicated problems of these structures. Therefore, study and measurement of curling in knitted fabrics is important. In this study, it is tried to model the three-dimensional wale wise curl of the fabric using finite element modelling. In this model the tensions in different parts of a knitted loop due to bending and torsional forces in knitting process, is calculated numerically. The result of the FEM model is considered as a measure indicator of the curl loop. By applying the same conditions of loop deformation in all fabric samples, the accumulated force was measured. Developed force is defined as an indicator of the level of curling in the fabric and was compared with experimental results. The comparison between experimental results and the mechanical model is in good correlation.}, keywords = {Polyester/cotton yarn, knitted fabric, finite element method,curling force}, url = {http://www.itast.ir/article_13957.html}, eprint = {http://www.itast.ir/article_13957_605a11a1e59181089692ee65f872dc76.pdf} }