The Effects of Take-Up Nozzle and Air-Jet Pressure on the Physical and Mechanical Properties of Rotor-Jet Cotton Yarns
Saeed
Shaikhzadeh Najar
Faculty Amirkabir University of Technology
author
سید محمد
عترتی
دانشگاه امیرکبیر، دانشکده نساجی
author
alireza
hoseinpour
Faculty Member IAU
author
behnaz
khatir
PhD student
author
text
article
2017
per
In this research, the effects of take-up nozzle and air-jet pressure on the physical and mechanical properties of rotor-jet cotton yarns were investigated. Two types of take up nozzle namely Soft, 4-grooved were used and an air-jet nozzle (90Z) was installed on a rotor spinning machine while air pressure was adjusted in the range of 0.2-1.2 (bar). Finally 12 samples of rotor-jet spun yarns and one sample of rotor spun yarn with linear density of 20 (Tex) and Nominal twist of 943 TPM were produced. The results were then statistically analyzed by IBM SPSS Statistics 20.The results show that by using of air-jet nozzle in rotor spinning, twist, abrasion resistance, and hairiness of produced yarns were increased while yarn irregularity changes was in-significant compared to normal rotor yarn. However, by using of soft and 4-grooved nozzles, tensile strength of produced yarns especially at air pressure of 0.4 and 0.6 bar were increased.
Journal of Textile Science and Technology
Today Textile Institute
2151-7162
6
v.
3
no.
2017
5
8
https://www.jtst.ir/article_57945_98051587c955500416b404dd11b0908c.pdf
A Review for Camouflage Pattern Designing, Evaluating and Breaking Methods
Mona
Zeinalpour yazdy
دانشجوی کارشناسی ارشد مهندسی نساجی دانشگاه یزد
author
Pedram
Payvandy
عضو هیات علمی دانشکده مهندسی نساجی دانشگاه یزد
author
text
article
2017
per
Applied camouflage technique in order preventing of sight are used by animals and humans for centuries. In military application camouflage techniques are used for hiding armies and equipment against enemies detection. In the past designing camouflage pattern was done by painting artists which was so costly and time-consuming. However todays by promotion in machine vision techniques such as image processing, designing suitable camouflage pattern can be done by using it. Some of image processing methods which are used in camouflage subjects are image enhancement filters, edge detection filters, mathematical morphology, using k-means clustering as well as the use of fractal dimension. In this paper the studies related to designing, evaluation and detection of camouflage pattern are mentioned and reviewed.- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - -
Journal of Textile Science and Technology
Today Textile Institute
2151-7162
6
v.
3
no.
2017
9
21
https://www.jtst.ir/article_57942_a779ed7bd0c639adf66d1ff5fd9d3dfc.pdf
Polypropylene non-woven coating with lipid / carboxymethyl cellulose / nanosilver nanomulsion for wound dressese application
Ramin
Khajavi
Member of Faculty, Islamic Azad University, South Tehran Branch
author
Niloofar
Rafizadeh Zaeem
Deprtment of Textile Engineering, science and research Branch, Islamic Azad University, P.O. Box: 1477893855, Tehran, Iran
author
Zeinab
Assgharpour
Deprtment of Textile Engineering, science and research Branch, Islamic Azad University, P.O. Box: 1477893855, Tehran, Iran
author
Mohammad Karim
Rahimi
Department of Microbiology, Medical Sciences of Iran, Islamic Azad University, P.O. Box: 1916893813, Tehran,Iran
author
text
article
2017
per
Advanced wound dresses are antimicrobial materials that can keep the wound surroundings moist and do not stick to wound. Therefore, in this research, the purpose is to coat a antimicrobial nanoemulsion on a polypropylene(PP) substrate to achieve the mentioned characteristics. non-woven samples of PP were coated with nanoemulsion (2g lipid, 0.3g carboxymethyl cellulose, 10 ml nanosilver) and drug containing nano emulsion (0.25g mupirocin, 0.25g lidocaine and 0.025g betamethasone). The specimens were characterized by infrared spectroscopy (FTIR), scanning electron microscopy to examine morphological structure, projectina microscopy, antimicrobial tests, water absorption and water maintenance teste. Scanning electron microscopy and projector microscopy and FTIR spectroscopy results confirmed the subsidence of nanoemulsion (EL-CS) and drug containing nano emulsion in the PP substrate, both coated samples ( EL-CS and EL-CS+MLB) completely inhibited growth of both gram-negative (E-Coli) and positive ( S-Areus) bacterias. The results of water absorption and water maintenance experiments showed that EL-CS coated samples had more absorbtion time (30 min) and water storage (60 min) comparing to non wrapped samples, but the EL-CS+MLB specimen did not show a significant difference in the two above-mentioned factors comparing to EL-CS. the prepared nanoemulsions and wound dresses obtained from them can have acceptable properties from use in medical appliations
Journal of Textile Science and Technology
Today Textile Institute
2151-7162
6
v.
3
no.
2017
23
29
https://www.jtst.ir/article_57944_a48f44e02456391be462f4d43a7c7458.pdf
Design of Optical Fiber Display in Weft Knitting
Ali Akbar
Merati
رئیس و عضو هیات علمی پژوهشکده مواد و فناوریهای پیشرفته در نساجی
author
حسن
حقیرزواره
دانشگاه صنعتی امیرکبیر، دانشکده مهندسی نساجی، پژوهشکده مواد و فناوری‏های پیشرفته در نساجی
author
زهرا
خرم طوسی
دانشگاه صنعتی امیرکبیر، دانشکده مهندسی نساجی، پژوهشکده مواد و فناوری‏های پیشرفته در نساجی
author
خسرو
معدنی پور
دانشگاه صنعتی امیرکبیر، دانشکده مهندسی انرژی و فیزیک، پژوهشکده اپتیک، لیزر و فتونیک
author
text
article
2017
per
In this research, a knitted fabric is designed and produced using optical fiber technology which is capable of showing a shape or image on its surface. With connecting the 750 micron polymethyl methacrylate optical fiber in the knitted fabric to the light source where the sheath of optical fibers are cut lightly, the bright spots are created on the surface of the knitted fabric. The defined arrangement of the bright spots can form an image on the surface of the fabric. The effective parameters such as the gauge of knitting machine, knit pattern and loop length are tested and optimized. To obtain a high resolution display, high quality and good brightness of the final image, factors such as durability, knit pattern, stability of the fiber in the knit, aspect ratio and the light intensity was considered. The results showed that with a yarn of 24/2 metric count, knit pattern of half-milano, gauge of 7 needle per inch with loop length of 8.6 mm and as same as 10 needles per inch loop with loop length of 7 mm are the optimal parameters for brightness, high resolution, aspect ratio of 1 and uniformity of bright spots.
Journal of Textile Science and Technology
Today Textile Institute
2151-7162
6
v.
3
no.
2017
31
36
https://www.jtst.ir/article_57943_86ceddae0165ac90312d39c75fee4f9c.pdf
A clarification of relationship between strategic human resource management and firm performance.
( case sudy: The Yazd elected spinning factories.)
انسیه
تاکی
مدرس دانشگاه
author
Reihaneh Alsadat
Tabaeeian
student
author
Gholamreza
Bordbar
Yazd University
author
text
article
2017
per
The purpose of this paper is studying the relationship between Strategic Human Resource Management (SHRM) and the performance of the firms. The study of theories shows that the SHRM has five dimensions, such as: rewarding, partnership, performance evaluation, recruitment and the quality of training.The purpose of this paper is studying the relationship between Strategic Human Resource Management (SHRM) and the performance of the firms. The study of theories shows that the SHRM has five dimensions, such as: rewarding, partnership, performance evaluation, recruitment and the quality of training Therefore, the relationship between each dimension of SHRM and the performance of the Yazd spinning factories is studied. The scholars of this paper use questionnaires to collect the data. Also in order to analyze the data, the SPSS software, Pearson correlation test and the LISREL are used. The conclusion shows the significant and positive relationship between The SHRM and its dimensions and the performance of the firms.
Journal of Textile Science and Technology
Today Textile Institute
2151-7162
6
v.
3
no.
2017
37
43
https://www.jtst.ir/article_57941_e53d1137641999af3b23034785102b24.pdf
The Identification And Ranking Factors Affecting The Transfer Of Technology In The Textile Industry
afsaneh
mehrabi
General Manager of Textile and Clothing Industry
author
text
article
2017
per
Today, technology is a major weapon for competition between companies. In today's world, success in is obviously dependent on the use of technology. One of the areas of technology management that requires this comprehensive and prospect is technology transfer. For this purpose, in this research, the identification and ranking of factors affecting the transfer of technology in the textile industry has been addressed. In this research, the factors affecting the transfer of technology are divided into four general criteria: the characteristics of the technology owner, the characteristics joint policies and technology for owner, the characteristics of technology and the characteristics of the receiver technology. The statistical population consisted of managers and experts in the textile industry. In this research, 30 experts have been selected. The present study is a survey based on the classification of descriptive research. Analytic Hierarchy Process Analysis (AHP) method and TOPSIS method have been used for ranking of variables and strategies. The results of the research showed that the technology receiver, the characteristics of technology, and joint policies and technology for owner were placed in first to fourth priorities The highest priority for each sub-criterion was, respectively: learning potential, familiarity with technology and market, the complexity of technology, and the dissemination of knowledge.
Journal of Textile Science and Technology
Today Textile Institute
2151-7162
6
v.
3
no.
2017
45
54
https://www.jtst.ir/article_57947_3b0ead8843bb75b096613865f28f8e26.pdf