NOPR Collection:

Biopolishing of different varieties of tasar silk

Wed, 01 Sep 1999 00:00:00 GMT

Title: Biopolishing of different varieties of tasar silk Authors: Gulrajani, M L; Agarwal, Shalini; Agarwal, Ritu Abstract: Two proteases, viz. Degummase and Protease ‘A’ Amano 2, were used for biopolishing different varieties of bleached and semi-bleached tasar silk fabrics. Gum was completely removed by enzyme treatment in bleached tasar silk samples, whereas some gum was left on semi-bleached and unbleached samples. Improvement in lustre was observed in case of all the varieties of tasar silk fabrics due to the cleaning of the fibre surface by the enzyme. Degummase gave a higher weight loss with all the varieties of tasar silk and is more effective than Protease ‘A’ Amano 2. Page(s): 226-228

Theoretical studies on shuttle checking: Part II—Shuttle checking by swell

Wed, 01 Sep 1999 00:00:00 GMT

Title: Theoretical studies on shuttle checking: Part II—Shuttle checking by swell Authors: Hari, P K; Gupta, K N; Behera, B K; Joshi, S G Abstract: Computer simulation for mathematical model of a swell has been done and the reduction in the shuttle velocity by impact with swell is predicted in terms of impactal and frictional braking. Reduction of 40% in shuttle speed by swell has been obtained and it is mainly due to impacts. The moment of inertia of swell is the most important variable and an optimum value of this parameter is required for maximum shuttle speed reduction. Page(s): 212-218

A simple device to measure the electric charges accumulating on textile fabrics

Wed, 01 Sep 1999 00:00:00 GMT

Title: A simple device to measure the electric charges accumulating on textile fabrics Authors: Parachuru, Lavanya Abstract: A simple device to detect and measure the electric charges accumulating on textile fabrics is described. The device measures the magnitude of the charge without touching the charged fabric and functions similar to an electroscope. Preliminary measuring trials with a group of apparel fabrics have demonstrated the feasibility of the device. Page(s): 208-211

Studies on combined flame-retardant and water-repellent treatments on cotton drill fabric

Wed, 01 Sep 1999 00:00:00 GMT

Title: Studies on combined flame-retardant and water-repellent treatments on cotton drill fabric Authors: Shekar, R Indu; Yadav, Ashok; Kasturiya, Nishkam; Raj, Hans Abstract: Bleached cotton drill fabric was treated with phosphorus-based flame retardant followed by water and oil repellents to achieve flame-retardant, water-repellent and oil-repellent properties for critical applications such as nuclear biological chemical protective suits. The results indicate that by an effective combination of above finishing agents, satisfactory performance could be achieved, although it is very difficult to understand the nature of reaction that takes place between a phosphorus-based flame retardant and the fluorocarbon-based water repellant. The treated fabrics were evaluated for flammability, water repellency and oil repellency. The effect of different add-on levels on important physical propert ies was also studied. The flame-retardant behaviour was persued through thermal studies. The flame- retardant and water-repellent treated fabric with a total add-on level of 17.7% gave satisfactory results in terms of functional and physical properties. Page(s): 197-207