Study of three-dimensional spacer fabrics:

Yip, Joanne; Ng, Sun Pui

doi:10.1016/j.jmatprotec.2007.12.073

Cited by 143 publications

(107 citation statements)

References 2 publications

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“…In order to understand the process, the e ect of a heated seat on thermal comfort during the initial warm-up period, an ergonomic evaluation of thermal comfort inside a car, the measurement of sweating and other factors have been investigated [2,4,5]. Moisture management behaviour, thermal properties and air transport of 3D warp knitted spacer fabric (3D spacer) and polyurethane foam (PU foam), which are commonly used as padding in car seat covers, have been examined [6][7][8][9]. ermal properties of porous nonwoven materials were analysed as well [10].…”

Section: Introductionmentioning

confidence: 99%

“…One group of researchers prefer polyethylene terephthalate (PET) bres for automotive applications (both for top and middle layer) due to their superior properties, such as high tenacity, resistance to abrasion, light, heat and chemical aging, UV resistance, dimensional stability, recyclability etc. [8,11,12]. e others are in favour of modi ed PU foam (in the middle layer) because of its excellent elasticity and very good recovery to compression [12].…”

Section: Introductionmentioning

confidence: 99%

“…e result of this study showed that warp knitted spacer fabrics demonstrated better recovery to compression, better thermal properties and better breathability compared to PU foam. Further research found out that fabrics using mono lament as spacer yarn generally had higher compression resistance compared to multi lament yarns [8,14]. Automotive producers usually use several techniques of heating and cooling to enhance physio logical comfort of car seats.…”

Section: Introductionmentioning

confidence: 99%

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The Study of Fabric Performance for Car Seats

Havelka¹,

Glombikova²,

Komarkova³

et al. 2017

TEK

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This paper deals with the investigation of the performance of car seat fabrics in terms of physiological comfort of sitting, specifi cally their water vapour resistance and air permeability. The current work presents an alternative approach to increasing the eff ectiveness of car seat fabrics through a combination of newly designed middle layer with forced convection achieved by a supplementary suction ventilation device. The supplementary device was designed to measure water vapour permeability by means of the sweating guarded hot plate (SGHP) system. It consists of two parts: a frame to grip a tested sample for measurements within the SGHP system and two suction ventilators which are arranged at one end of the mentioned frame in order to provide suction into the tested fabric plane during the SGHP test. The results of this investigation show that water vapour transport is increased by approximately 20% compared to the standard way of measurement by means of SGHP because of forced air fl ow in the plane of ribbed -channelled structure of the car seat middle layer. The fi ndings of this study have a number of important implications for future practice. The combination of a car seat cover with channelled structure and forced air fl ow improves physiological comfort of sitting which is a key issue for both drivers and manufacturers. The suggested device for forced air fl ow convection in the plane of a car seat fabric has not yet been part of an actual car seat, however it is possible to use its principles in a smart car seat prototype. Keywords: physiological comfort, air suction, channelled fabric structure Izvleček

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Study of Fabric Performance for Car Seats

Havelka¹,

Glombikova²,

Komarkova³

et al. 2017

TEK

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“…Studies on structure of spacer fabric shows that spacer filament property, the number of spacer filaments per unit area and cross arrangement of spacer filaments have significant influence on compression pressure distribution. The compression resilience with cross arrangement of spacer filaments is better than that with a tilted upright arrangement; the bigger the bending stiffness of spacer filament, the better the compression recovery and the harder the spacer fabric feel [9][10][11]. Research on compression stress changes of spacer fabric under compression was focused on plate and spherical compression, which was used to obtain spherical compression stress and strain by integrating the theoretical formula according to the stressstrain curve of plate compression [12,13].…”

Section: Introductionmentioning

confidence: 99%

Analysis of structure of warp-knitted spacer fabric on pressure indices

et al. 2015

Fibers Polym

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Spacer fabrics are widely used as mattress materials of bed and wheelchair. It is due to the fact that the special sandwich structure is effective in evenly dispersing pressure to improve pressure concentration, which prevents ulcer disease of long-term seated/lying people. However, there are few investigations on relationship between structure of spacer fabric and pressure behaviour. So, the main content dealt with in the paper was to adopt pressure pad system to measure pressure distribution behaviour of spacer fabric compressed by seated people, and pressure indices with average gradient integral, pressure peak, average pressure and contacting area were featured based on pressure nephogram. Pressure tests of varying surface stitch density, spacer filaments arrangement density and layers of spacer fabric were conducted. Experimental results showed that mattress without spacer fabric existed serious pressure concentration effect, while mattress with spacer fabric obviously improved hip pressure concentration effect. Pressure concentration effect could be well improved by increasing surface stitch density, spacer filament arrangement density and thickness. Moreover, it was a good method to produce mattress with good pressure property by combining reasonable layers of spacer fabrics to meet the same pressure-relief requirements.

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“…The high temperature was maintained for about 1 min to allow the heat to transmit through the foam sheets which are held in a space between the male and female molds, so that the foam sheets are heat-set to the desired cup shape. Traditionally, the molded cups are assessed by visual examination against the "plastic shot" which is a transparent cup template used for checking the shape conformity of the outer cup surface (Yip and Ng, 2008). The quality of molded bra cups often varies with different foam materials, molding temperatures and time (Yu et al, 1998).…”

Section: Introductionmentioning

confidence: 99%