Permeability and impact properties of warp-knitted spacer fabrics for protective application

Rajan, T. Palani; Ramakrishnan, G.; Kandhavadivu, P.

doi:10.1080/00405000.2015.1084135

Cited by 18 publications

(13 citation statements)

References 16 publications

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“…The high void ratio of a regularly perforated 3D substrate in terms of porosity ensures very low dielectric losses, as most of the volume within the substrate is occupied by air. The ratio of the total volume of voids to the entire volume of solid including voids is termed as the void ratio of that solid [ 17 , 32 ]. A large number of voids or air cavities brings the dielectric constant of the perforated substrate closer to the dielectric constant of air and also results in lower dielectric losses [ 33 ].…”

Section: Methodsmentioning

confidence: 99%

“…A breathable textile antenna can be an essential substitute to conventional textile antennas and can cope with the above-mentioned working strains more effectively. The breathability is a factor of porosity, the higher the porosity of materials used to construct an antenna, the more an antenna becomes breathable [ 17 ]. The high air permeability (AP) of textiles can effectively dissipate humidity back into the environment [ 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

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Breathable Textile Rectangular Ring Microstrip Patch Antenna at 2.45 GHz for Wearable Applications

Memon

Paula

Malengier

et al. 2021

Sensors

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A textile patch antenna is an attractive package for wearable applications as it offers flexibility, less weight, easy integration into the garment and better comfort to the wearer. When it comes to wearability, above all, comfort comes ahead of the rest of the properties. The air permeability and the water vapor permeability of textiles are linked to the thermophysiological comfort of the wearer as they help to improve the breathability of textiles. This paper includes the construction of a breathable textile rectangular ring microstrip patch antenna with improved water vapor permeability. A selection of high air permeable conductive fabrics and 3-dimensional knitted spacer dielectric substrates was made to ensure better water vapor permeability of the breathable textile rectangular ring microstrip patch antenna. To further improve the water vapor permeability of the breathable textile rectangular ring microstrip patch antenna, a novel approach of inserting a large number of small-sized holes of 1 mm diameter in the conductive layers (the patch and the ground plane) of the antenna was adopted. Besides this, the insertion of a large number of small-sized holes improved the flexibility of the rectangular ring microstrip patch antenna. The result was a breathable perforated (with small-sized holes) textile rectangular ring microstrip patch antenna with the water vapor permeability as high as 5296.70 g/m2 per day, an air permeability as high as 510 mm/s, and with radiation gains being 4.2 dBi and 5.4 dBi in the E-plane and H-plane, respectively. The antenna was designed to resonate for the Industrial, Scientific and Medical band at a specific 2.45 GHz frequency.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Breathable Textile Rectangular Ring Microstrip Patch Antenna at 2.45 GHz for Wearable Applications

Memon

Paula

Malengier

et al. 2021

Sensors

View full text Add to dashboard Cite

show abstract

“…And the results indicate that fabric with secured locknit structure and higher fabric thickness shows the high values in the compression, bending, and shear properties. 7,8 However, when the spacer layer of the double-needle brush fabric is cut by the slitting machine, little surface area is available for bonding at the face-core interface, the bonding strength becomes very weak. 9 Therefore, when it is subjected to foreign object impact or shear load, especially accompanied by impact, the interface delamination after the spacer wires overlap becomes the primary concern, which will be limited in applications such as slippage in car cushions.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on shear properties of warp-knitted brush fabrics

Chu

Lin

Jamshaid

et al. 2020

Journal of Engineered Fibers and Fabrics

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Warp-knitted brush fabrics are composed of an outer surface formed by weaving the front and rear needle beds with spacer yarns interposed between them. Warp-knitted brush fabrics can be used as a non-slip cover for car seat cushions; the adhesion between non-slip fabric and car seat is related to the shear strength of warp-knitted brush fabrics. In this article, to study the factors affecting the shear force of warp-knitted brush fabrics, three different processing methods and four different stretching speed intervals were used to find the effects of stiffeners and action of different speed intervals on shear properties of fabrics. The experimental results show that the stiffener treatment can improve the shear resistance of the warp-knitted brush fabrics, and the effect of different speed intervals can affect the shear resistance of fabrics. These findings will have a guiding significance in the design and production of warp-knitted brush fabrics applied to fabrics such as car seat cushions, and the results can also help to study the shear properties of warp-knitted brush fabrics for wider applications.

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“…When footwears are introduced by means of interlining, it should withstand the impact and pressure at the painful area to be diminished around 254.97 kN/m 2 [32]. The energy absorption capacity of spacer fabrics has been investigated by means of various researches [33][34][35] and their investigation of direct impact at different energy levels was observed. On the one hand, at low impact energy the absorption capacity of single ply spacer fabric is high and it totally acts as an elastic fabric, and on the other hand, the structure of spacer fabric became distorted during high impact energy.…”

Section: Introductionmentioning

confidence: 99%

Thermal comfort properties of plasma-treated warp-knitted spacer fabric for the shoe insole

Rajan

Sundaresan

2018

Journal of Industrial Textiles

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Thermo-physiological comfort properties are crucial aspects of interlining material comfort for shoe insole which can be examined for permeability and conductivity. Air and water vapour permeability, conductivity and resistance of thermal are the main criteria for thermo-physiological comfort properties. Clothing comfort can be enhanced through special finishes including plasma which is one among the well known for surface modification. Oxygen and argon atmospheric plasma were used to analyse the comfort properties of polyester warp-knitted spacer fabric based on the fabric thickness and gas processing time. The outcomes exposed a notable influence in the comfort properties of polyester spacer fabrics after the atmospheric plasma processing time. The results too pointed out that the water vapour permeability and thermal resistance increased, although the air permeability and thermal conductivity decreased with the atmospheric plasma processing. When considering all the values of plasma-treated spacer fabrics, the 3 mm thickness of polyester spacer fabric proved to have better response and comfort properties than the 2 and 4 mm spacer fabrics. The findings show that final comfort properties of polyester warp-knitted spacer fabrics can be improved by using plasma treatments, and argon plasma treatment is the best method when compared to the oxygen plasma treatment.

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Permeability and impact properties of warp-knitted spacer fabrics for protective application

Cited by 18 publications

References 16 publications

Breathable Textile Rectangular Ring Microstrip Patch Antenna at 2.45 GHz for Wearable Applications

Breathable Textile Rectangular Ring Microstrip Patch Antenna at 2.45 GHz for Wearable Applications

Experimental investigation on shear properties of warp-knitted brush fabrics

Thermal comfort properties of plasma-treated warp-knitted spacer fabric for the shoe insole

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