Electrospinning of poly-(vinyl alcohol) (PVA) with soluble eggshell membrane (S-ESM) in aqueous media was carried out under 20%-70% relative humidity (RH). The S-ESM/PVA spinning dope was 11.66 wt% solutes concentration with weight ratio of S-ESM : PVA = 40:60. Fiber morphology and fiber diameter were determined using field emission scanning electron microscopy (FE-ESM). A RH of 40% was found to be optimal for obtaining a sufficient fiber collection of S-ESM/PVA fibers. S-ESM particles were appeared on the surface of the fibers at 20%-30% RH. It was also found that the diameter of S-ESM/PVA blend fiber decreased with increasing the RH.
The aim of this study was to quantify the changes in hand properties of cotton piqué crepe fabrics in terms of mechanical and surface properties after actual wear. Three pairs of pajama pants were tailored from a cotton piqué crepe fabric and three long-term hospitalized patients wore the pants for 12 to 18 months. The mechanical and surface properties of the fabrics were measured using the KES-FB system and hand values were calculated. The tactile feel of the crepe fabrics was assessed before and after wear. The extensibility at maximum tensile load of fabrics increased with wear, and the bending and shear properties of fabrics decreased after wear-wash cycles. Primary hand values calculated by equation KN202-LDY show that after wear the Hari (anti-drape stiffness) decreased and Fukurami (fullness) increased. These changes resulted in a softer hand than that of the unworn fabrics, and students evaluated this softness as the preferable hand. Fullness and antidrape stiffness changed while the piqué surface shape was retained, thus generating additional softness.
Purpose – The traditional Japanese cotton-crepe fabric chijimi has been used for summer clothing for over a century because of its good skin comfort. The high extensibility of this fabric relies on the high-twist cotton yarns used in the weft direction. The purpose of this paper is to show the effect of environmental humidity on the extensibility of highly twisted cotton yarns to help in choosing weft yarn suitable for woven fabric. Design/methodology/approach – Four highly twisted cotton yarns are examined under 10-90 percent RH and in 25°C water. Cyclic tensile tests are performed to obtain the tensile energy, resilience, extensibility at maximum applied load (EM), and residual strain. Findings – Comparing the same yarn-count samples Y1 and Y2, the EM of Y2 (2,200 T/m) is larger than that of Y1 (1,000 T/m) under all RH conditions, and the difference increases at humidity over 60 percent RH. For fabric crepe samples woven by Y1 (warp) and Y2 (weft), the extensibility (EM-1) in the weft direction is in the range 16-26 percent, which is equivalent to that of outer-knitted fabrics. The extensibility and recovery of chijimi is largely dominated by the twist of weft yarns, which is also influenced by changes in relative humidity. Originality/value – The skin comfort of Takashima chijimi has been of interest, but the high extensibility of this cotton fabric has not been given much attention. The results of this study show that yarn twist is key to controlling extensibility in high-humidity environments.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.