NOPR Collection:

Dyeing of polyurethane fibre with Ocimum sanctum

Fri, 01 Sep 2006 00:00:00 GMT

Title: Dyeing of polyurethane fibre with Ocimum sanctum Authors: Patel, B H; Patel, P B Abstract: Polyurethane fibre has been dyed with a methanolic extract from the leaves of Ocimum sanctum containing ursolic acid as the major colourant with or without various metallic salts and different mordanting techniques. The improvement in depth of colour without altering the tone is observed. The colour of the samples has been evaluated on computer colour matching system in terms of K/S and L* a* b* colour coordinates. The dyeing show moderate to good fastness to washing, light and rubbing. Page(s): 474-476

Effect of polyethylene glycol on physical properties of durable press finished cotton fabric

Fri, 01 Sep 2006 00:00:00 GMT

Title: Effect of polyethylene glycol on physical properties of durable press finished cotton fabric Authors: Afshari, Mehdi; Tavakoli, Mitra; Norouzifar, Maryam; Masoumi, Zohreh Abstract: Effect of molecular weight (400, 1000, 1500) and concentration (5-30%) of polyethylene glycol (PEG) on physical properties of durable press finished cotton fabrics using dimethylol dihydroxyl ethylene urea (DMDHEU) by pad-dry-curing has been studied. The results show that the addition of PEG influences crease resistance, abrasion resistance, water absorbency and tensile strength of treated fabric. By increasing molecular weight and concentration of PEG, crease resistance of the processed cotton fabric increases. In the presence of PEG with increasing time and temperature of curing, the crease resistance and water absorbency increase. The best results have been obtained using 400 molecular weight of PEG, 5% concentration of PEG, 2 min curing time, and 200^oC curing temperature. Page(s): 470-473

A novel motion regulation of the heald frame on looms

Fri, 01 Sep 2006 00:00:00 GMT

Title: A novel motion regulation of the heald frame on looms Authors: Hongliang, Guo; Guoming, Ye Abstract: An 8-order polynomial motion has been proposed which optimizes the heald frame's dynamical performances. Compared to the simple harmonic and 7-order polynomial motion regulations, this motion regulation is proved to be more advantageous. The motion regulation improves the dynamic performance of heald frame. It is found to be suitable for high speed looms. Page(s): 467-469

Suitability of cycloidal cam in shedding mechanism

Fri, 01 Sep 2006 00:00:00 GMT

Title: Suitability of cycloidal cam in shedding mechanism Authors: Bhattacharya, Salil Kumar; Das, Kisalay Abstract: A suitable cycloidal cam has been designed and compared with the simple harmonic cam to study the behaviour of warp yarn tension and warp breakage rate. Electronic tensiometer was used to measure the tension of the warp yarn during weaving with and without shuttle for both types of cam to understand the effect of shuttle propulsion on warp yarn tension. It is observed that the warp breakage rate is comparatively less in case of cycloidal cam. The tension behaviour is also found to be smoother in case of cycloidal cam. Page(s): 465-466