فصلنامه علوم و فناوری نساجی
سال دوازدهم شماره 2 (تابستان 1402)

The drape of fabric is one of the features that influence the aesthetics and comfort of clothing. In this study, the effect of important physical fabric parameters, including weight, thickness, density, bending length (in longitudinal, transverse and oblique directions) in 26 different woven (with plain, twill, and satin weaves) and knitted fabrics on their drape coefficient was investigated. The drape coefficient was evaluated by both objective (by performing the Cusick test) and subjective (ranking by 5 judges) methods. Then, by Nonlinear multivariate regression analysis, it was determined that the most effective factors in predicting the drape coefficient of the fabrics are its bending length in both longitudinal and transverse directions. According to the relationship developed for predicting the drape coefficient based on the two mentioned factors and calculating the error percentage, it was found that the correlation coefficient between the experimental and the predicted results was 0.90 and the error values ranged from 0.25 to 5.42% with an average of 1.39%, which indicates a good agreement between the model results and the results of the Cusick method. In addition, from comparing the ranking of fabrics based on the model results and the subjective evaluation results, it was found that the rank of 15 fabric samples is the same in both methods and the difference is limited to one rank in other samples.

Felt is one of the most unique textiles created without weaving and through braiding. Iran is a pioneer of felt production in the world. Given the intense economic competition in the world, it is important to update and improve this product according to advancements and requirements of the society. One of the defects in the currently used felts is the difficult way of washing self-cleaning to the distortion of its design, pattern and form following washing. Since removing this defect can enhance the productivity of felt, the present article was designed to solve this problem through the use of nanoparticles with a specific concentration. Toward this goal, nanoparticles of titanium dioxide, cerium dioxide and magnesium oxide were selected to create self-cleaning properties and resistance against abrasion in traditional woolen felts. Accordingly, necessary tests were performed on 10 pieces of felt with 4 repetitions. The obtained results showed that felts containing 0.3% titanium dioxide had a 119% increase in self-cleaning and a 53% increase in wear resistance when compared to samples without nanoparticles. This increase was also significant when compared to other nanoparticles at a 5% level.

The use of face mask is a good way to protect people from many pollutants. Different materials such as hydroxyapatite, can be used to improve the ability to absorb pollutants. In the other hand, this substance is known as a valuable substance for medical applications. The objective of this research is to apply various types of hydroxyapatite at concentrations of 10% and 20% to treat the middle layer of disposable masks. Subsequently, a statistical investigation will be conducted to assess the impact of this substrate on pollutant absorption and antibacterial activity. A device was assembled and utilized to simulate the absorption of pollutants, enabling the quantification of pollutant absorption by individual layers within disposable masks. The results of the tests showed that the sample with a middle layer incorporating hydroxyapatite nanostructure and zinc oxide nanoparticles demonstrated a bacterial reduction percentage exceeding 99% against both Staphylococcus aureus and Escherichia coli bacteria. The sample containing 10% ordinary hydroxyapatite exhibited the highest material absorption and, consequently, the highest efficiency.

In the customer's interaction with the company, environmental information is received by the five senses. The compatibility or lack of compatibility of the environment's characteristics with the customer's sensory tastes can cause the customer's satisfaction or dissatisfaction. This research has two goals. The effect of mixed sensitive marketing on customer loyalty of Iranian clothing brands and optimization of the effect of mixed sensitive marketing on customer loyalty. The research method is descriptive-survey and practical in terms of purpose. The statistical population is unlimited and includes the buyers and consumers of clothes of 18 Iranian brands in the age group of children, teenagers and adults. The sample size of 384 was determined and selected using non-probability sampling method. In order to collect the data, the mixed sensitive marketing questionnaires of Kian and Loui 2009 and the customer loyalty questionnaire of vaida,kanopaite 2015 were used. In order to analyze the data, structural equations and LISREL software were used. The meta-heuristic algorithm part of the genetic algorithm was used for its optimal modeling. In this way, the rules related to the effect of the mixed dimensions of sensory marketing on customer loyalty were first identified by the decision tree and then these rules were optimized with the help of genetic algorithm with MATLAB software. The results of the research in the first part showed the approval of all sensory marketing components except the interaction component. In the second part, using the decision tree with the help of the genetic optimization algorithm, customer loyalty can be predicted with 97% accuracy and accuracy using 27 rules.

The purpose of this research is the economic evaluation of the production of  polyester Texturized Interlace ( ITY) yarn, which is used in the production of Crep fabrics (Black Chador). Whereas, the raw materials  of this type of yarns is producing localy(Shahid Tendgoyan Petrochemical),therefoe the production of this kind of yarns are more economic inside of our country. For this evaluation, industrial accounting principles were applied. In this regard, the investment amount for the annual production of 5940 tons of yarn is being estimated up to 815.747 million tomans, that brings the following economic outcomes: Irr (25.8 percent), capital return period (30 months), production BEP (20.86 percent), capital ratio In circulation to fixed capital (7.43 percent), fixed investment per capita (5474.8 million Tomans/person), profit to capital ratio (36.35 percent), the cost price of the product (54.904 Tomans per kilogram). To sum up, conducting this research shows that by launching this project, in addition to creating jobs and reducing of the import of the desired product, it will be also prevented for leaving more foreign currency from the country.

Recently, manufacturing of antiperspirant and antibacterial sports textiles has been considered important for special sportswear, underwear, socks, and shoes. Meanwhile, the use of supplementation procedures and the application of nanomaterials have been addressed as a suitable approach to meet this goal. In this study, Coolmax fabric has been used as the primry material for sportswear, due to its superior performance compared to natural fabrics. Despite its favorable properties, Coolmax fabric induces challenges for us due to its similarity to natural fabrics in terms of antimicrobial and antiperspirant properties. The researchers of the study have attempted to solve this problem using the effective substance of cyclodextrin and silver nanoparticles as antibacterial and antiperspirants materials on Coolmax fabric and investigate and analyze their impacts further. First, sulfonation and mercerization supplements have been used to modify the fabric's superficial properties. Then, the fabrics have been supplemented through cyclodextrin and silver nanoparticles immersion to investigate their antimicrobial and antiperspirant properties. To this end, scanning electron microscopy (SEM), body's antiperspirants and antibacterial experiments have been done. Physical properties of the product including fabric's bending potential, return from wrinkles and staining impacts which are the important properties of sportswear products have been analyzed accordingly. Results showed that the supplementation procedures did not have any unfavorable impact on fabric's physical properties; however, it is concluded that the improvement of their antibacterial and antiperspirant properties