Visible Light Shielding Performance of Fabrics with Non-Circular Cross Section Fiber

Abstract

The models of polyethylene terephthalate (PET) non-circular cross-section (NCCS) fibers were established, and the characteristic parameters of non-circular cross-section fiber used in this numerical simulation were extracted. Furthermore, the differences of refracted light intensity ratio Irz and the direction of refracted light βt among circular, trilobal and quadri-lobal cross-section fibers were analyzed theoretically. The results show that the refracted light intensity ratios Irz of these fibers were in the range of 0.94~0.95. Both the trilobal and quadri-lobal cross-section fibers' βt, which was the angle of refracted light to Y-axis, changed non-monotonically and much more intricately than that of circular cross-section ones. Moreover, according to the theory of geometrical optics, the effects of trilobal and quadri-lobal cross-section shapes on the changes of internal refracted light and transmitted light in fibers were also conducted. The results suggested that the refracted and transmitted light were changed more effectively in the quadri-lobal cross-section fiber. The results of the experiment show that the shielding properties of quadri-lobal cross-section filament fabrics were better than that of the counterparts with circular fibers, but the difference was limited or insignificant.

Fabrication of Shaped Chitin Fibers by Gradient Regeneration Combined with a Physical Pressure Method

“…However, designing spinnerets for shaped fibers can be challenging and requires a processing technology. 14 Achieving the desired cross-sectional shape often necessitates a specific spinneret capillary length-to-width ratio (l/w) of about 12 to get a fiber cross-sectional l/w of 4. 15 Additionally, obtaining flat fibers can be challenging even with a flat spinneret hole due to the extrusion swell effect of polymers.…”

“…Another interesting approach was taken by Niu et al, who created hollow fibers using cellulose nanofibrils as building blocks through a specially designed coaxial wet-spinning process. However, designing spinnerets for shaped fibers can be challenging and requires a processing technology . Achieving the desired cross-sectional shape often necessitates a specific spinneret capillary length-to-width ratio ( l / w ) of about 12 to get a fiber cross-sectional l / w of 4 .…”

The Design and the Development of Shading Jacquard Fabrics for Curtains<i></i>

“…Curtain fabrics have appropriate shading performance can fully show the characteristics of the comfortable, safe, elegant and generous. Has appeared on the market of shading sex curtain are mostly anti-glare coating fabric [1,2] and weaving shading fabric [3]. By contrast shading jacquard fabrics with double layers are processed without printing and coating which are environment friendly and can reduce the cost.…”

Light transmission of weft-knitted fabrics for seamless garments

“…[8][9][10] A profiled fiber endows the fabric with higher visual shielding capability than a round cross-sectional fiber, because the profiled fiber has the ability to change the light incident angle and increase the rate of light reflection and scattering inside the fibers and yarns. 11 Liu and Wang 12 developed a theoretical model and investigated the optical properties of a single trilobal cross-section fiber and a single quadrilobe cross-section fiber. Under the same conditions, the quadrilobe crosssection fiber can increase the rate of light reflection and scattering inside the fibers and yarns when compared with trilobal cross-section fibers, and give the fabric a lower light transmission.…”