scholarly journals Effect of Loop Length On Thermal Comfort Properties of Mesh Knitted Fabrics

2020 ◽  
Vol 27 (120) ◽  
pp. 243-251
Author(s):  
Esra TAŞTAN ÖZKAN ◽  
Binnaz KAPLANGİRAY
Keyword(s):  
Thermal Resistance ◽  
Air Permeability ◽  
Test Methods ◽  
Standard Test ◽  
Loop Length ◽  
Knitted Fabrics ◽  
Mesh Structure ◽  
Polyester Mesh ◽  
Moisture Management ◽  
Thermal Absorptivity

In this study, it is aimed to change the loop length of knitted fabrics with a mesh structure and to investigate the effect of loop length differences on thermal and moisture transmission properties. For this purpose, six fabrics with different loop lengths were produced in two different knittings and yarn types. Thermal conductivity, thermal absorptivity, thermal resistance, air permeability and moisture management properties of these fabrics were measured according to standard test methods. The results showed that as the yarn gets finer and loop length increases, the air permeability values will increase. It was observed that as the loop length increase, the overall moisture management capacity (OMMC) and thermal absorptivity of the fabrics will decrease. The thermal resistance values of two ply textured polyester mesh knitted fabrics decreased with increasing density and the highest loop length two ply textured polyester mesh knitted fabric showed the highest thermal resistance value.

scholarly journals Influence of Fabric Parameters on Thermal Comfort Performance of Double Layer Knitted Interlock Fabrics

2017 ◽  
Vol 17 (1) ◽  
pp. 20-26 ◽  
Author(s):  
Ali Afzal ◽  
Sheraz Ahmad ◽  
Abher Rasheed ◽  
Faheem Ahmad ◽  
Fatima Iftikhar ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermal Resistance ◽  
Thermal Comfort ◽  
Specific Heat ◽  
Double Layer ◽  
Thermal Insulation ◽  
Loop Length ◽  
Knitted Fabrics ◽  
Thermal Transmittance ◽  
Thermal Absorptivity

Abstract The aim of this study was to analyse the effects of various fabric parameters on the thermal resistance, thermal conductivity, thermal transmittance, thermal absorptivity and thermal insulation of polyester/cotton double layer knitted interlock fabrics. It was found that by increasing fibre content with higher specific heat increases the thermal insulation while decreases the thermal transmittance and absorptivity of the fabric. It was concluded that double layer knitted fabrics developed with higher specific heat fibres, coarser yarn linear densities, higher knitting loop length and fabric thickness could be adequately used for winter clothing purposes.

scholarly journals The Efficiency of Non-Flammable Functional Underwear

2014 ◽  
Vol 14 (3) ◽  
pp. 174-178 ◽  
Author(s):  
Viera Glombikova ◽  
Petra Komarkova
Keyword(s):  
Thermal Resistance ◽  
Moisture Transport ◽  
Protective Clothing ◽  
Air Permeability ◽  
Extreme Conditions ◽  
Flame Resistance ◽  
Knitted Fabrics ◽  
Vapour Permeability ◽  
Moisture Management ◽  
Physiological Properties

Abstract This study evaluates the efficiency of non-flammable functional underwear used as a secondary heat barrier in extreme conditions. Five groups of knitted fabrics were analysed for flame resistance and selected physiological properties (water vapour permeability, air permeability, thermal resistance and liquid moisture transport by moisture management transport). The results indicated similar levels of flame resistance for the materials tested but show important differences in terms of physiological characteristics, namely liquid moisture transport, which influences the safety and comfort of protective clothing.

scholarly journals An Investigation On Air and Thermal Transmission Through Knitted Fabric Structures Using the Taguchi Method

2017 ◽  
Vol 17 (2) ◽  
pp. 152-163 ◽  
Author(s):  
Anindya Ghosh ◽  
Prithwiraj Mal ◽  
Abhijit Majumdar ◽  
Debamalya Banerjee
Keyword(s):  
Air Permeability ◽  
Raw Material ◽  
Knitted Fabric ◽  
Loop Length ◽  
Knitted Fabrics ◽  
Yarn Count ◽  
Fabric Structures ◽  
Noise Factors ◽  
Single Jersey ◽  
Thermal Absorptivity

Abstract Knitted fabrics have excellent comfort properties because of their typical porous structure. Different comfort properties of knitted fabrics such as air permeability, thermal absorptivity, and thermal conductivity depend on the properties of raw material and knitting parameters. In this paper, an investigation was done to observe the effect of yarn count, loop length, knitting speed, and yarn input tension in the presence of two uncontrollable noise factors on selected comfort properties of single jersey and 1×1 rib knitted fabrics using the Taguchi experimental design. The results show that yarn count and loop length have significant influence on the thermo-physiological comfort properties of knitted fabrics.

Effects of Laundering on Moisture Management and Air Permeability of Different Chitosan Treated Nylon 6,6 Elastane Fabrics Using EDTA and Triton X-100

2021 ◽  
Vol 58 (2) ◽  
pp. 97-105
Author(s):  
Nilüfer Yıldız Varan ◽  
Yavuz Çaydamlı
Keyword(s):  
Photoelectron Spectroscopy ◽  
Ethylenediaminetetraacetic Acid ◽  
Lower Layer ◽  
Air Permeability ◽  
Complexing Agent ◽  
Three Solutions ◽  
Knitted Fabrics ◽  
Moisture Management ◽  
Nylon 6,6 ◽  
Triton X

Abstract This study investigates the effect of washing fabrics (nylon 6.6 powernet knitted fabrics with 30% spandex) treated with chitosan on their moisture management and air permeability. The knitted fabrics were treated with three different solutions of chitosan and dimethylol dihydroxyethylene urea (DMDHEU); in addition to chitosan and DMDHEU, one solution contained the complexing agent ethylenediaminetetraacetic acid (EDTA) and the other contained the nonionic surfactant and penetration agent octylphenol ethoxylate. The three solutions were compared in terms of their effect on moisture management and air permeability properties. Nylon fabrics treated and washed with these solutions were characterized by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. Nylon fabrics treated with chitosan and DMDHEU showed the potential to transfer liquid moisture to the lower layer and keep the layer next to the skin dry after 20 washes.

scholarly journals The Influences of Loop Length and Raw Material on Bursting Strength Air Permeability and Physical Characteristics of Single Jersey Knitted Fabrics

2017 ◽  
Vol 12 (1) ◽  
pp. 155892501701200
Author(s):  
Züleyha Değirmenci ◽  
Ebru Çoruh
Keyword(s):  
Shape Factor ◽  
Strength Properties ◽  
Air Permeability ◽  
Raw Material ◽  
Unit Weight ◽  
Loop Length ◽  
Knitted Fabrics ◽  
Bursting Strength ◽  
Loop Shape ◽  
Single Jersey

This paper reports the effect of loop length and raw material on the air permeability and the bursting strength of plain knitted fabrics. In this study, a series of plain knitted fabrics were produced on a circular knitting machine with cotton, polyester, acrylic and viscose by Ne 30/1 yarns. Each fabric type was produced with four different stitch lengths. All the fabrics were knitted at the same machine setting in order to determine the effect of their structure on the fabric properties. Their geometrical and physical properties were experimentally investigated. The influences of the loop length and the raw material on the number of the courses per cm, number of the wales per cm, loop shape factor, thickness, fabric unit weight, tightness factor, air permeability and bursting strength are analyzed. Statistical analysis indicates that raw material and loop length significantly parameters affect the air permeability and the bursting strength properties of the fabrics.

Study on the Pore Structure of Cotton-Like Polyester Knitted Fabrics

2013 ◽  
Vol 821-822 ◽  
pp. 270-273 ◽  
Author(s):  
Yun Feng Li ◽  
Li Qian Huang ◽  
Jian Yong Yu
Keyword(s):  
Pore Diameter ◽  
Air Permeability ◽  
Test Methods ◽  
Image Method ◽  
Asymmetric Distribution ◽  
Loop Model ◽  
Knitted Fabrics ◽  
Density Method ◽  
Model Method ◽  
Comfort Property

Porous structure of fabric has a significant impact on the fabric functions such as air permeability, water transport and heat retention. In this article, six knitted fabrics with different blend ratio of cotton-like modified polyester fiber and cotton fiber were prepared. Pore sizes and its distribution of the fabrics were measured by CFP-1100-AI pore diameter tester. Porosity of the fabrics was obtained by three ways respectively, namely loop model method, image method and density method. The results show that the pore diameter of blended knitted fabrics presents an asymmetric distribution, that is, the smaller pores have a greater proportion to the total pores than larger pores. There exists an obvious diameter change in the pore size distribution which indicates the transition from intra-yarn pores to inter-yarn pores. Among the 3 test methods for porosity, the porosity obtained by the image method is much smaller than that of loop model method and density method, but its relationship to the fiber blending ratio is consistent with the variation law of fabric air permeability, which indicates intra-loop pores takes greater impact on air permeability of fabrics. The results of present study can play a theoretical guiding role in comfort property design and product development of cotton-like polyester fabrics.

scholarly journals Investigation of the comfort properties of traditional woven fabrics with different structural parameters

2020 ◽  
Vol 71 (04) ◽  
pp. 302-308
Author(s):  
MINE AKGUN ◽  
GIZEM KARAKAN GUNAYDIN ◽  
AYÇA GÜRARDA ◽  
ERHAN KENAN ÇEVEN
Keyword(s):  
Thermal Resistance ◽  
Water Vapour ◽  
Structural Parameters ◽  
Air Permeability ◽  
Woven Fabrics ◽  
Water Vapour Permeability ◽  
Test Results ◽  
Vapour Permeability ◽  
Thermal Absorptivity

Turkish traditional Buldan weavings are known as special fabrics in terms of providing comfortable clothes which are known to be natural and healthy in Denizli, Turkey. The research presented in this paper assesses the effects of different fabric structural parameters of Buldan fabrics on comfort properties such as thermal resistance, thermal absorptivity, water vapour permeability and air permeability. Five different Buldan fabrics woven with different fabric structural parameters were produced. According to test results, cotton/Tencel Buldan fabrics indicated similar comfort properties with the 100% cotton Buldan fabric properties. Additionally, the lowest thermal absorptivity was observed from 100% cotton Buldan fabrics which give the warmth feeling among the evaluated samples.

scholarly journals Comparative Analysis of Knits from Peat Fibre and its Combinations with Other Natural Fibres

2017 ◽  
Vol 25 (0) ◽  
pp. 24-29
Author(s):  
Daiva Mikučioniené ◽  
Lina Čepukonė
Keyword(s):  
Comparative Analysis ◽  
Physical Properties ◽  
Water Adsorption ◽  
Structural Parameters ◽  
Air Permeability ◽  
Raw Material ◽  
Loop Length ◽  
Knitted Fabrics ◽  
Natural Origin ◽  
Mechanical And Physical Properties

Natural and man-made fibres of natural origin are more and more widely used, while consideration of sustainability is constantly increasing. The properties and processing behaviour of newly introduced fibres of natural origin are usually compared and often predicted on the basis of widely investigated fibres; however, this prediction sometimes does not have any confirmed basis. Structural parameters and the majority of mechanical and physical properties of knitted fabrics depend on technical characteristics of the knitting machine, on the properties of yarns as well as on the origin of the raw material. This study attempts to develop knits from new natural peat fibres and their combination with widely used woollen, cotton and elastomeric Lycra yarns and to investigate the influence of peat fibre’s nature on structural parameters such as loop length, wale and course spacing, area density, the tightness factor and on main physical properties such as dimensional stability, air permeability and water adsorption.

Investigation of thermoregulation properties of various ceramic-containing knitted fabric structures

2019 ◽  
Vol 50 (5) ◽  
pp. 716-739 ◽  
Author(s):  
Laimutė Stygienė ◽  
Sandra Varnaitė-Žuravliova ◽  
Aušra Abraitienė ◽  
Sigitas Krauledas ◽  
Julija Baltušnikaitė-Guzaitienė ◽  
...  
Keyword(s):  
Thermal Resistance ◽  
Cold Weather ◽  
Heat Accumulation ◽  
Spectroscopy Analysis ◽  
Knitted Fabrics ◽  
X Ray ◽  
Moisture Management ◽  
Infrared Rays ◽  
Knitted Structure ◽  
Fabric Structures

To ensure the thermal comfort during high physical activity, clothes must have good thermoregulation properties. Textiles containing ceramic additives, which are able to absorb and emit back the thermal energy from the human body, can be used to improve the thermal properties of the fabric. The aim of the research was to investigate the thermal and moisture management properties of different, three-layer knitted fabrics containing fibers impregnated with infrared-emitting ceramic particles. The thermal efficiency of the manufactured knits was characterised by the dynamics of accumulated/released heat generated by infrared rays and expressed as achieved steady-state surface temperature while and after the heating. Thermal resistance and liquid moisture management properties were investigated during the research as well. The elemental analysis of different pure bio-ceramic additives in yarns, used for development of knitted fabrics, was determined by X-ray fluorescence spectroscopy analysis. It was determined that heat accumulation is directly related to the calculated quantity of bio-ceramic additives in the knits. The obvious correlation between accumulated/released heat, thermal resistance, and the quantity of bio-ceramic additives in all investigated knitted structures was also investigated. Taking into account all the results obtained during the study of the thermoregulation properties, the optimal knitted structure, which could be comfortable for wearing next to the skin in cold weather, was selected.

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