Real-Time Monitoring of Indigo Concentrations in the Dyebath with a Laser Diode Spectrometer

A laser diode absorption spectrometer is coupled with a continuous dilution system for real- time monitoring of indigo dyeing of denim yarn. The reduced form of indigo in the dyebath is continuously pumped by a peristaltic pump into a mixing cuvette, where it is diluted by a factor of 80 with aerated water and oxidized into its stable for..

Estimating Blend Ratios from the Tensile Behavior of Wool/Polyester Fiber Bundles

Wool/polyester blended tops with different blend ratios are collected and made into fiber- bundle specimens for tensile testing. From the specific stress-extension curves of the blended bundles measured by the Sirolan-Tensor, the characteristics of the tensile curves are analyzed and the relationships between these characteristics and the..

Using Fuzzy Theory to Predict the Properties of a Melt Spinning System

Though the extruder screw speed of melt spinning, the gear pump's gear speed, and the winder's winding speed are the major factors affecting the tensile strength of as-spun fibers and yarn count (denier), no mathematical model has been proposed to describe the cause and effect of these phenomena. In general, chemical fiber manufacturers o..

Mapping of Spin Finish Oils on Nylon 66 Fibers

Mapping the distribution of spin finish oils on nylon carpet fibers is the focus of this investigation. Nylon 66 fibers of two modification ratios, 2.4 and 3.0, manufactured for the carpet industry, are compared to similar fibers pulled from dyed and finished carpet tufts. Fibers are treated with osmium tetraoxide to provide contrast in s..

2012년도 경기도 실용화기술개발사업 홍보

Compression Force Measured by Fiber Optic Smart Cellular Textile Composites

This paper is concerned with a study of compression force measured by smart cellular textile composites integrated with fiber Bragg grating (FBG) sensors. The novel design of the cellular textile composite structures integrated with FBG sensors is reported. Unit cells of a cylindrical composite shell are fabricated from glass and polyeste..

Acrylic and Acetovinylic Polymers for Preserving and Restoring Cotton Textiles

With the aim of better understanding the phenomena related to the application of polymeric materials on natural fiber textiles for restoration purposes, six commercial polymers based on acrylic and acetovinylic monomers are tested on modem cotton textiles. Cotton samples are impregnated with water dispersions of these polymers. The morpho..

Thermal Storage/Release and Mechanical Properties of Phase Change Materials on Polyester Fabrics

Melamine formaldehyde microcapsules containing octadecane are synthesized by the interfacial polymerization method, and the size, shape, and thermal storage/release prop erties of the synthesized microcapsules are analyzed by FTIR, SEM, and DSC. Polyester fabrics are then coated with the microcapsules under various conditions of concentra..

Circumferential Superdrawing of Hollow Poly(ethylene Terephthalate) Filaments

Amorphous poly(ethylene terephthalate) (PET) can be stretched at low tension without causing any observable crystallization at temperatures above Tg. This resultant increased length with no measurable change in orientation is called superdrawing. Superdrawing of hollow PET fibers in the circumferential direction is demonstrated in a hot w..

Simulating Cavitation and Hydraulic Flip Inside Hydroentangling Nozzles

Hydroentangling owes its success to the peculiar properties of coherent water jets. For hydroentangling to be feasible at higher pressures, it is extremely important that water jets maintain their collimation for an appreciable distance downstream of the nozzle. How ever, water-jet breakup accelerates at high pressures. Recent studies hav..