Thermal comfort properties of weft knitted quilted fabrics

Abbasi, Sara; Marmaralı, Arzu; Ertekin, Gözde

doi:10.1108/ijcst-07-2019-0111

Cited by 8 publications

(11 citation statements)

References 22 publications

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“…Yarn twist is negatively correlated with thermal insulation properties due to reduction of air gaps in the structure, while increasing layers is positively correlated due to increasing resultant thickness . Investigations on the effect of changing knit − and woven patterns − on thermal resistance have been performed. For example, comfort properties of jersey derivative (Single Jersey and pique) were investigated, , where Ertekin et al considered two different engineered yarns (from cotton and polyester), and Ibrahim et al, included different types finishing treatments (soft-, bio-, antimicrobial-, and water-repellent finish).…”

Section: Introductionmentioning

confidence: 99%

Structure–Property Investigation of Knit Patterns on Thermal Comfort: A Holistic Approach

Kabir

Uluturk

Pang

et al. 2023

ACS Appl. Eng. Mater.

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While recent advances in material science enabled multifunctional textiles, little is known about how the textile structure alone changes the response. This research aims to enhance the heat resistance of the inner fabric layer of winter wear clothing, specifically for military personnel by inducing air gaps in the fabric structure, and investigate the structure−property relationships in terms of thermal and moisture wicking. Here, 12 knitted textiles are produced with the same polyester yarn using a Stoll flatbed knitting machine. Among the 12 knitted textiles, six are standard knit patterns and other six are non-standard (NS) complex knit patterns. Thermal resistance is measured using the guarded sweating hotplate method, while moisture transfer involved vertical and horizontal moisture wicking methods. One-way ANOVA of the results exposits that changing knit structures can significantly manipulate both thermal and moisture characteristics; a knitted fabric with two different sides can provide different insulations when the technical face and back are reversed during use because of asymmetric entrapped pockets of air. NS knits exhibit superior insulation properties (up to 333% more compared to a Single Jersey fabric) than simple designs due to the inherent self-folding nature. On the other hand, wicking properties of standard knits are better than those of NS structures due to having more capillary spaces with lower thickness. The liquid wicks faster along the wale (lengthwise) direction for most of the case rates, which can also be tuned by introducing self-folding behavior. Both thermal and moisture transfer properties are driven by the design features of the fabrics such as symmetricity and self-folding as well as structural parameters such as fabric thickness, weight, and porosity, as revealed by a simple linear regression model. This research explores the tunability of comfort properties by changing the fabric structure to drive the functional design of future apparel.

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Section: Introductionmentioning

confidence: 99%

Structure–Property Investigation of Knit Patterns on Thermal Comfort: A Holistic Approach

Kabir

Uluturk

Pang

et al. 2023

ACS Appl. Eng. Mater.

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“…14 Meanwhile, when a certain filling weight is applied, down wadding offers the highest thermal insulation, followed by wool, silk, polyester, and cotton. [14][15][16] To present, a few experimental studies have tried to explore the effect of different quilts on people's thermal comfort during sleep.…”

Section: Introductionmentioning

confidence: 99%

“…Published studies included that in a specified range, quilt thermal insulation rises as filling weight increases 14 . Meanwhile, when a certain filling weight is applied, down wadding offers the highest thermal insulation, followed by wool, silk, polyester, and cotton 14–16 …”

Section: Introductionmentioning

confidence: 99%

Effects of quilts on comfortable indoor temperatures and human thermal responses during sleep

et al. 2022

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Quilts play a vital role in the thermal comfort of sleeping people. This study aims to investigate the comfortable indoor temperatures and thermal responses when people sleep in different quilts. The experiment tested three kinds of quilts (down, silk, and polyester), and each kind of quilt involved six filling weights. Sixteen participants (eight males and eight females) conducted whole‐night sleeping trials to acquire skin temperatures, bedding temperatures, and thermal perceptual responses. The lower and upper limits of air temperatures (Tlower$$ {T}_{lower} $$ and Tupper$$ {T}_{upper} $$) for comfortable sleeping were obtained. The results indicated that thermal sensation votes were in the range from 0.1 (close to “neutral”) to 1.3 (close to “slightly warm”) when participants felt comfortable and preferred “no change” in thermal preference. The corresponding comfortable mean skin and bedding temperatures were 34.6 ~ 35.2°C and 31.2 ~ 32.7°C, respectively. Tlower$$ {T}_{lower} $$ and Tupper$$ {T}_{upper} $$ had good linear correlations with bedding insulations. For the same bedding insulation, the Tlower$$ {T}_{lower} $$ and Tupper$$ {T}_{upper} $$ were highest for using silk quilts, followed by down and polyester quilts. The comfort ranges of air temperatures and quilt insulations were finally determined. The findings may benefit understanding the thermal requirement of quilts and help people select and design quilts to achieve thermal comfort.

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“…Much research has focused on bi-layer structures to achieve a high level of comfort [5][6][7][8][9][10]. This is because the performance of layered fabrics in thermo-physiological regulation is better than that of single-layer textile structures [11][12][13][14]. Several researchers have investigated the influence of fiber fineness and cross-sectional shapes [15,16] as well as the effects of fiber type, stitch type [17,18], yarn type [19], fabric structure [20][21][22][23][24], bi-layer fabrics [25][26][27], multi-layer sportswear [28,29], blended fabric [30,31], and 2D and 3D designs of sportswear [17,[32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Thermo-Physiological Comfort Properties of Sportswear with Different Combination of Inner and Outer Layers

et al. 2021

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Consumers expect high-performance functionality from sportswear. To meet athletic and leisure-time activity requirements, further research needs to be carried out. Sportswear layers and their specific thermal qualities, as well as the set and air layer between materials, are all important factors in sports clothing. This research aims to examine the thermal properties of sports fabrics, and how they are affected by structure parameters and maintained with different layers. Three inner and four outer layers of fabric were used to make 12 sets of sportswear in this study. Before the combination of outer and inner layers, thermal properties were measured for each individual layer. Finally, the thermal resistance, thermal conductivity, thermal absorptivity, peak heat flow density ratio, stationary heat flow density, and water vapor permeability of bi-layered sportswear were evaluated and analyzed. The findings show that sportswear made from a 60% cotton/30% polyester/10% elastane inner layer and a 100% polyester outer layer had the maximum thermal resistance of 61.16 (×103 K·m2 W−1). This performance was followed by the sample made from a 90% polyester/10% elastane inner layer and a 100% polyester outer layer, and the sample composed of a 100% elastane inner layer and a 100% polyester outer layer, which achieved a thermal resistance value of 60.41 and 59.41 (×103 K·m2 W−1), respectively. These results can be explained by the fact that thicker textiles have a higher thermal resistance. This high-thermal-resistance sportswear fabric is appropriate for the winter season. Sportswear with a 90% polyester/10% elastane inner layer had worse water vapor resistance than sportswear with a 60% cotton/30% polyester/10% elastane and a 100% elastane layer. Therefore, these sports clothes have a higher breathability and can provide the wearers with very good comfort. According to the findings, water vapor permeability of bi-layered sportswear is influenced by geometric characteristics and material properties.

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Thermal comfort properties of weft knitted quilted fabrics

Cited by 8 publications

References 22 publications

Structure–Property Investigation of Knit Patterns on Thermal Comfort: A Holistic Approach

Structure–Property Investigation of Knit Patterns on Thermal Comfort: A Holistic Approach

Effects of quilts on comfortable indoor temperatures and human thermal responses during sleep

Thermo-Physiological Comfort Properties of Sportswear with Different Combination of Inner and Outer Layers

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