NISCAIR Online Periodicals Repository Collection: IJFTR Vol.33(3) [September 2008]

Measurement of surface property using a special sensor developed for pile materials

Fri, 29 Aug 2008 22:58:59 GMT

Title: Measurement of surface property using a special sensor developed for pile materials

Authors: Fujimoto, Takaka; Sunderland, Matthew R; Tandona, Surinder K; Asano, Chie M; Asano, Akira; Murata, Choji; Fukuyama, Hiroaki

Abstract: A special sensor, like human finger tips, to measure the surface friction of various carpets with cut or loop pile has been developed. The main body of the instrument is the KES multiple device and the attachments covered with the fake skin are appropriately attached to it. This instrument provides quick and easy testing for carpets and fabrics. This rapid method would be useful for quantifying friction and for designing high quality pile products.

Page(s): 253-257

Changes in dynamic drapability of polyester fabrics with weave density, yarn twist and yarn count obtained by regression equations

Fri, 29 Aug 2008 22:58:59 GMT

Title: Changes in dynamic drapability of polyester fabrics with weave density, yarn twist and yarn count obtained by regression equations

Authors: Matsudairaa, Mitsuo; Yamazaki, Sachiko; Hayashi, Yoshiteru

Abstract: Somc ncw parameters of dynamic drapability, such as revolving drape increase coefficient (DJ, revolving drape coefficicnt at 200 rpm (D₂₀₀), and dynamic drapc coeflicient at swinging motion (Dd), have been defined using a device of dynamic drape tester and the regression equations are derivcd fi'om mechanical parameters of fabrics obtained Ii'om KES systcm. These equations have been applied to polyester fabrics used for women's fine dress materials and the effects of weave dcnsity, yarn twist and yarn count on these parameters studied. It is observed that Dr and Dd have a maximum value at the optimum weave density. These values increase with the increase in yarn twist in the case of Dechine" fabrics. These values decrease in the case of taffeta fabrics, and increase in the case of georgette with yam count. Changes in D200 with weave density, yarn twist and yarn count are found to be little for all the fabrics. ode number decreases and conventional static drape coefficient (Ds) increases with weave density.

Page(s): 223-229

Measurement and modeling of drape using digital image processing

Fri, 29 Aug 2008 22:58:59 GMT

Title: Measurement and modeling of drape using digital image processing

Authors: Behera, B K; Pattanayak, Ajit Kumar

Abstract: A drapemeter based on image processing technique has been designed and developed for complete analysis of the drape profile of apparel fabric. Image processing helps to determine some new drape parameters. Multiple regression equations for drape parameters have been developed from low stress mechanical properties of fabric to predict the drapability and the results are compared with the drape value obtained from image processing method. The interdependence between drape parameters and the mechanical properties of fabrics are also studied. A very good correlation has been found with bending and shear properties of the fabric. A higher drape coefficient is accompanied with less number of nodes. A fabric with higher tensile energy is less susceptible to draping or falling from the edge of a contour, whereas a fabric with higher extensibility always favours the folding and hanging of fabric at the edges of the platform, resulting in low drapability.

Page(s): 230-238

Carbonization conditions for electrospun nanofibre of polyacylonitrile copolymer

Fri, 29 Aug 2008 22:58:59 GMT

Title: Carbonization conditions for electrospun nanofibre of polyacylonitrile copolymer

Authors: Yamashita, Yoshihiro; Aoki, Naoya; Ko, Frank; Miyake, Hajime

Abstract: Nanofibres of polyacrylonitrile-co-methylmethacrylate (PAN-co-MMA) copolymer have been produced by electrospinning. These nanofibres have been oxidized and carbonized. The effect of heat treatment conditions has been studied. The critical heat treatment (oxidation) temperature is found to be 280ºC. By preventing the nanofibre assemblies from thermal contraction during heat treatment, the surface appearance of the nanofibre assembly acquires a metallic luster. Calcinations of the nanofibres at 900ºC in nitrogen atmosphere results in nitrous fused heterocyclic structure which suggests that the calcinations temperature greater than 1000ºC would be necessary to produce nitrogen-free carbon nanofibres.

Page(s): 345-353