The impact of textile relief structures on pressure distribution and heat transport

Abstract

A long-term static position causes inter alia hypoxia, poor blood circulation, slowing down of the metabolism, and problems in air and heat transport, which in consequence lead to the occurrence of bedsores. In the design of seats and mattresses for people with impaired mobility, advanced textile and composite materials should be used to improve safety and comfort. This functionality can be obtained using spatial textile materials. The aim of the research was to assess the impact of two unmodified woven relief structures I.0 and II.0 made of different yarns and ones modified by inserting linear elements (1: braided round tape and 2: polyethylene tube) to their rib tunnel on the heat transport and on the pressure distribution under loading of 0.5, 1, and 2 N. Element 1 lowers the value of average pressure on the fabrics I.1 and II.1, respectively, by 6.9% and 3.5% at the lowest loading and by 9.8% and 4.6% at the highest loading. For fabric II.2 with element 2, the decrease is of 10.4% and 8.4%, respectively. The thermal conductivity values increase by 8.8%, 9.4%, and 40.1%, respectively for I.1, II.1, and II.2. The pressure distribution and thermal characteristic of the fabrics depend on the type of yarn, the structure of ribs, and the linear element and its fit to the rib tunnel.

A SnO2 shell for high environmental stability of Ag nanowires applied for thermal management

“…The heat transfer analysis of AgNWs and Ag/SnO 2 NWs spraycoated and uncoated (control sample) fabrics were performed on Alambeta (Sensora, Czech Republic) apparatus. The Alambeta tests 19 were based on measuring the amount of heat owing through the sample placed between two platesthe upper one, heated up to about 32 C and the bottom one with a temperature of 22 C. The plates of 110 cm 2 area exerted a constant pressure of 200 Pa AE 10%. Measurements were taken at the temperature of 20 C and relative humidity of 27% for 5 minutes.…”

Comfort-Related Properties of Workwear for Employees With Motor Disabilities

“…A barrier to the professional activation of people with disabilities may be an employer who is afraid of additional formalities and obligations related to the employment of a disabled person, as well as costs resulting from lower productivity, the limited mobility of a disabled employee, adjusting work positions, and providing preventive care [11][12][13][14]. It is necessary to adapt the premises and surroundings of the workplace to the needs of disabled people and to equip workstations according to the needs resulting from the disability -for example, by using personalised wheelchair seats to prevent skin lesions (bedsores) [15][16][17][18][19].…”

Supine dynamic simulation and latex pillow design for Chinese women based on finite element method

“…The size of the latex pillow with more human comfort is designed according to the dynamic pressure distribution of the neck and the dynamic change of the neck socket displacement, when the human body is lying on the back of the latex pillow that ensures the lowest and most evenly distributed pressure. 19 It can provide a more scientific and effective method for the development and design of the series of textile bedding.…”