Impact of Pre-Finishing Process on Comfort Characteristics of Stretchable Cotton Fabric

2015 ◽  
Vol 10 (3) ◽  
pp. 155892501501000 ◽  
Author(s):  
Dunja Sajn Gorjanc ◽  
Matejka Bizjak
Keyword(s):  
Water Vapor ◽  
Thermal Insulation ◽  
Structural Changes ◽  
Structural Parameters ◽  
Cotton Fabrics ◽  
Vapor Permeability ◽  
Warp Yarn ◽  
Finishing Process ◽  
The Impact ◽  
Mass Increase

The comfort characteristics of fabrics (especially thermal insulation and permeability properties) are closely associated with the changes in their structural parameters. The reaction of a stretchable fabric, either after the finishing process or after a mechanical deformation, is higher than the reaction of conventional fabrics. The reaction after the finishing process is usually expressed in terms of density, thickness or mass increase, and in dimensional changes. The structural changes influence thermal insulation and water vapor permeability properties, which are the most important properties associated with the comfort of textiles. This paper focuses on the impact of the pre-finishing process on the comfort characteristics of pure cotton fabrics and of cotton fabrics with elastane in the weft direction in plain and twill weave. The results indicate that after the pre-finishing process (scouring/bleaching) for the analyzed fabrics, water vapor resistance and thermal resistance decrease. These decreases occur due to the structural changes inside the fabrics (warp yarn density and mass increase, whereas thickness decreases).

Evaluation of Luster, Hand Feel and Comfort Properties of Modified Polyester Woven Fabrics

2017 ◽  
Vol 12 (4) ◽  
pp. 155892501701200 ◽  
Author(s):  
Rong Zhou ◽  
Xueli Wang ◽  
Jianyong Yu ◽  
Zhenzhen Wei ◽  
Yu Gao
Keyword(s):  
Water Vapor ◽  
Evaluation System ◽  
Moisture Absorption ◽  
Water Vapor Permeability ◽  
Objective Evaluation ◽  
Cotton Fabrics ◽  
Woven Fabrics ◽  
Vapor Permeability ◽  
Pet Fabric ◽  
Better Than

This paper reports a hollow copolyester fiber modified with polyethylene glycol and sodium-5-sulfo-bis-(hydroxyethyl)-isophthalate, abbreviated as ECDP-H, which has the potential to be a replacement for cotton. The objective evaluation of luster (contrast glossiness) and Kawabata Evaluation System for Fabrics (KES-F) (four Primary Hand Parameters and the Total Hand) of ECDP-H, PET and cotton fabrics are studied in order to investigate the cotton-like appearance of the ECDP-H. The results of moisture regain and dynamic moisture absorption values obtained indicate that the hydrophilicity of the ECDP-H fabric is better than that of PET fabric. The thermo-physiological performance for three fabrics is determined using air and water vapor permeability, wicking, warm-cooling feeling, thermal resistance and vapor resistance. The results show that the ECDP-H fabric has better hand and comfort properties than cotton.

scholarly journals Thermal Behavior of Worsted Fabrics Produced from Different Yarn Spinning Systems

2013 ◽  
Vol 8 (3) ◽  
pp. 155892501300800 ◽  
Author(s):  
Abolfazl Mirdehghan ◽  
Siamak Saharkhiz ◽  
Hooshang Nosraty
Keyword(s):  
Thermal Conductivity ◽  
Thermal Properties ◽  
Thermal Behavior ◽  
Thermal Insulation ◽  
Weft Yarn ◽  
Spun Yarn ◽  
Finishing Process ◽  
Yarn Structure ◽  
Fabric Structures ◽  
The Impact

This paper describes an experimental study of the impact of yarn structure on the thermal properties of worsted fabric. In this study, four different spun yarn structures (Solo, Siro, and single ply and two ply Ring) were woven into four fabric structures (Plain, Twill2/1, Twill2/2 and Basket2/2) and their thermal properties were studied. In addition, the thermal behavior of finished and unfinished samples was also evaluated. Results showed that the finishing process causes an increase in thermal conductivity and warmth to weight factor and a decrease in thermal insulation. Different spinning systems, also affect the thermal properties of the worsted fabrics. Samples with Siro yarns in the weft were found to have the highest thermal conductivity and those made from single ply weft yarn the lowest thermal conductivity. A relation between fabric thermal insulation and air permeability and thickness was also found.

Relation of Water Vapor Permeability of Elastomers to Molecular Structure

1966 ◽  
Vol 39 (3) ◽  
pp. 751-754
Author(s):  
Y. Iyengar
Keyword(s):  
Molecular Structure ◽  
Water Vapor ◽  
Structural Parameters ◽  
Monomer Unit ◽  
Water Vapor Permeability ◽  
Styrene Butadiene Rubber ◽  
Vapor Permeability ◽  
Butadiene Rubber ◽  
Quantitative Correlation ◽  
Styrene Butadiene

Abstract This communication is a quantitative correlation of water vapor permeability of nonpolar elastomers with molecular structure. Permeability of physical blends and of composite layers of elastomers are also discussed. Permeability—Elastomer Structure.—Steric hindrance and unsaturation influence water vapor permeability of elastomers. The low permeability of isobutylene—isoprene (butyl) rubber is attributed to the presence of bulky methyl groups in its isobutylene component. The high unsaturation in isoprene and butadiene is blamed for the high permeability of natural rubber and styrene butadiene rubber. Hence, permeability should be correlated quantitatively with a factor which can evaluate and combine these two structural parameters. Defining the factors A and B to express the relative molar concentrations of unsaturated and steric groups in the average monomer unit of elastomers as (unsaturation) A=1+x/X (steric groups) B=1+y/Y

scholarly journals Moisture and Thermal Transport Properties of Different Polyester Warp-Knitted Spacer Fabric for Protective Application

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Qing Chen ◽  
Dahua Shou ◽  
Rong Zheng ◽  
Ka-Po Maggie Tang ◽  
Bailu Fu ◽  
...  
Keyword(s):  
Water Vapor ◽  
Water Absorption ◽  
Thermal Insulation ◽  
Water Vapor Permeability ◽  
Volume Density ◽  
Air Permeability ◽  
High Mass ◽  
Vapor Permeability ◽  
Spacer Fabric ◽  
Spacer Fabrics

AbstractWarp-knitted spacer fabrics are generally used for sportswear, functional clothing, protective clothing, and other applications. This article studied the heat and mass transfer properties of polyester warp-knitted spacer fabrics from low thickness (2 mm) to high thickness (20 mm), from low mass (247.34 g/m2) to high mass (1,585.9 g/m2), and surface structure in plain or mesh construction. Water vapor permeability, air permeability, water absorption, and thermal insulation property were conducted to evaluate the spacer fabrics. The results revealed that with increasing volume density the water vapor permeability of spacer fabrics decreased, but the water absorption ratio increased. The water vapor permeability of fabrics increased when thickness decreased and volume density increased. It was further found that spacer fabrics with mesh worn nearby the skin and plain structure worn far from the skin could facilitate water vapor and air transmission. The difference of 8.82% for water vapor permeability and 14.19% for air permeability were found between testing mesh side up and down for the spacers (2.56 and 3.37 mm), respectively. Thermal insulation ratio was highly and significantly correlated with heat transfer coefficient at −0.958 and with thickness at 0.917. Thermal insulation ratio is highly and significantly correlated with air permeability at 0.941.

Layer by layer assembly of antibacterial inclusion complexes

2016 ◽  
Vol 28 (3) ◽  
pp. 368-377
Author(s):  
Sule Ugur ◽  
Merih Sarıışık ◽  
Gizem Türkoğlu ◽  
Gökhan Erkan ◽  
Emre Erden
Keyword(s):  
Water Vapor ◽  
Inclusion Complex ◽  
Cotton Fabric ◽  
Self Assembly ◽  
Water Vapor Permeability ◽  
Cotton Fabrics ◽  
Vapor Permeability ◽  
Layer By Layer ◽  
Content Type ◽  
Assembly Method

Purpose – The purpose of this paper is to create a textile material which shows antibacterial activity with resistance to environmental conditions by using volatile active agent inclusion complex and self-assembly method. Design/methodology/approach – An inclusion complex of carvacrol and β-CD is generated by kneading method and deposited on the cotton fabrics by using a nanofabrication method named as layer-by-layer (LbL) deposition method. Three different concentration of CD and CD:Car aqueous solutions were deposited on cotton fabrics. Attenuated total reflectance Fourier transform infrared spectroscopy (FTIR-ATR), scanning electron microscopy (SEM), antimicrobial efficacy test of fabrics against washing and some physical tests (water vapor permeability, air permeability) were performed on the fabrics before and after the treatment with CD to evaluate the effect of the LbL process on cotton fabric properties. Findings – The results showed that the coated fabrics with CD/CD:Car multilayer films enhanced the antimicrobial efficacy of cotton fabrics against to Klebsiella pneumonia and Staphylococus aureus bacteria. Air and water vapor permeability properties of the cotton fabric effected after the LbL deposition process sure enough. With SEM and FTIR-ATR analysis the CD:Car complex presence were verified. The durability of antibacterial properties were analyzed after one and ten washing (40°C and 30 min) cycles. Originality/value – This work provides a novel and simple method for CD and inclusion complex of carvacrol film deposition by self-assembly method on cotton fabrics and their application onto cotton fabrics to gain antibacterial property.

Effect of Drying Temperature in Biopolymeric Films of Cassava Starch and its Effect on Wettability, Water Vapor Barrier and Mechanical Properties

2018 ◽  
Vol 930 ◽  
pp. 270-275 ◽  
Author(s):  
Victor Rafael Leal Oliveira ◽  
M.K.S. Monteiro ◽  
F.K.G. Santos ◽  
R.H.L. Leite ◽  
E.M.M. Aroucha
Keyword(s):  
Mechanical Properties ◽  
Water Vapor ◽  
Structural Changes ◽  
High Efficiency ◽  
Low Cost ◽  
Water Vapor Permeability ◽  
Cassava Starch ◽  
Life Extension ◽  
Vapor Permeability ◽  
Drying Time

Coating technologies with biopolymeric films of low cost and high efficiency are effective in maintaining the chemical and sensory characteristics and shelf-life extension of several fruits.Films of cassava starch/glycerol were synthesized at different temperature and time conditions (25oC / 60h, 40oC / 5h, 60oC / 3h and 80oC / 2h) in order to decrease the drying time of the filmogenic solutions.SEM analysis (scanning electron microscopy), WVP (water vapor permeability), wettability and mechanical properties were evaluated in order to identify morphological and structural changes in the polymeric matrix in different conditions.Changes in temperature and drying time significantly reduced the roughness and affected the barrier characteristics, effectively improving tensile strength. A reduction of more than 90% in the drying time was identified.

scholarly journals Destruction of thermal insulation and effectiveness of the thermal energy transfer system

2019 ◽  
Vol 124 ◽  
pp. 01030
Author(s):  
E. R. Bazukova ◽  
T. O. Politova ◽  
E. R. Khaziakhmetova ◽  
A. A. Medyakov ◽  
I. Kolcunova
Keyword(s):  
Thermal Insulation ◽  
Thermal Energy ◽  
Structural Changes ◽  
Flow Density ◽  
Vapor Permeability ◽  
Thin Fiber ◽  
Insulation Aging ◽  
Coefficient Of Thermal Conductivity ◽  
Conductivity Water ◽  
Energy Transportation

The work is devoted to improving the efficiency of the system of thermal energy transportation. The results of determining the thermophysical properties, such as the coefficient of thermal conductivity, water absorption, vapor permeability, the percentage of structural changes in the fibers during heating and exposure to vibration, basalt super thin fiber and other thermal insulation materials are presented. The results of thermal imaging testing control of basalt super-thin fiber mats are presented. The effect of the degree of thermal insulation aging on the increase in the heat flow density is shown.

Choroidal structural changes and choroidal vascularity index in patients with systemic hypertension

2021 ◽  
pp. 112067212110356
Author(s):  
Nazife Aşıkgarip ◽  
Emine Temel ◽  
Ahmet Kıvrak ◽  
Kemal Örnek
Keyword(s):  
Blood Pressure ◽  
Systolic Blood Pressure ◽  
Patient Group ◽  
Structural Changes ◽  
Structural Parameters ◽  
Systemic Hypertension ◽  
Cross Sectional ◽  
Treatment Naïve ◽  
The Mean ◽  
The Impact

Purpose: To assess the impact of systemic hypertension on the choroidal structure and choroidal vascularity index (CVI). Methods: This prospective cross-sectional study comprised 50 eyes of 50 treatment-naive hypertensive patients and 50 eyes of 50 healthy subjects. Choroidal thickness (CT) was measured in the subfoveal region, 1500 µm nasal to the fovea, and 1500 µm temporal to the fovea. Binarization of the enhanced depth-optical coherence tomography images was performed with Image-J software. The CT, choroidal area (CA), luminal area (LA), and CVI were compared statistically. Results: The mean subfoveal, nasal, and temporal CT were decreased in the patient group (p 0.003, 0.026, and 0.001, respectively). The mean CA, LA, and CVI were decreased in the patient group in comparison to controls ( p = 0.047, 0.009, and 0.016 respectively). The correlation between the subfoveal CT and systolic blood pressure was significant ( r = −0.450, p < 0.001). There was a significant correlation between the systolic blood pressure and CVI ( r = −0.401, p < 0.001). Conclusion: The significant decrease in the structural parameters and CVI show that choroid is affected in patients with treatment-naive hypertension.

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